{"id":477274,"date":"2023-08-09T09:10:23","date_gmt":"2023-08-09T09:10:23","guid":{"rendered":""},"modified":"2023-09-05T11:14:24","modified_gmt":"2023-09-05T11:14:24","slug":"foreign-key","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/ir\/wiki\/foreign-key\/","title":{"rendered":"\u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc"},"content":{"rendered":"<p>\u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u06cc\u06a9 \u0645\u0641\u0647\u0648\u0645 \u0627\u0633\u0627\u0633\u06cc \u062f\u0631 \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0627\u0633\u062a \u06a9\u0647 \u0631\u0627\u0628\u0637\u0647 \u0627\u06cc \u0628\u06cc\u0646 \u062f\u0648 \u062c\u062f\u0648\u0644 \u062f\u0631 \u06cc\u06a9 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0631\u0627\u0628\u0637\u0647 \u0627\u06cc \u0628\u0631\u0642\u0631\u0627\u0631 \u0645\u06cc 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\u0634\u0631\u062d \u0632\u06cc\u0631 \u0627\u0633\u062a:<\/p>\n<ol>\n<li>\n<p><strong>\u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u0627\u0631\u062c\u0627\u0639\u06cc:<\/strong> \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u0646\u062f \u06a9\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062c\u062f\u0648\u0644 \u0648\u0627\u0628\u0633\u062a\u0647 (\u0641\u0631\u0632\u0646\u062f) \u0628\u0647 \u0637\u0648\u0631 \u062f\u0642\u06cc\u0642 \u0628\u0627 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062c\u062f\u0648\u0644 \u0645\u0631\u062c\u0639 (\u0648\u0627\u0644\u062f) \u0645\u0637\u0627\u0628\u0642\u062a \u062f\u0627\u0631\u062f. \u0627\u0632 \u0627\u06cc\u062c\u0627\u062f \u0633\u0648\u0627\u0628\u0642 \u06cc\u062a\u06cc\u0645 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc \u06a9\u0646\u062f \u0648 \u062b\u0628\u0627\u062a \u0631\u0627 \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u062f\u0627\u062f\u0647:<\/strong> \u0628\u0627 \u0627\u0639\u0645\u0627\u0644 \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u0627\u0631\u062c\u0627\u0639\u06cc\u060c \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0627\u0632 \u062f\u0631\u062c \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0646\u0627\u0645\u0639\u062a\u0628\u0631 \u06cc\u0627 \u0645\u062a\u0646\u0627\u0642\u0636 \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc \u06a9\u0646\u0646\u062f \u0648 \u0646\u0627\u0647\u0646\u062c\u0627\u0631\u06cc \u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0631\u0627 \u06a9\u0627\u0647\u0634 \u0645\u06cc \u062f\u0647\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u062f\u0627\u062f\u0647\u0647\u0627:<\/strong> \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u06af\u0627\u0646 \u0631\u0627 \u0642\u0627\u062f\u0631 \u0645\u06cc \u0633\u0627\u0632\u0646\u062f \u062a\u0627 \u0628\u0627 \u0627\u06cc\u062c\u0627\u062f \u0631\u0648\u0627\u0628\u0637 \u0628\u06cc\u0646 \u062c\u062f\u0627\u0648\u0644 \u0645\u0631\u062a\u0628\u0637\u060c \u062f\u0627\u062f\u0647 \u0647\u0627 \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u0645\u0648\u062b\u0631 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0639\u0645\u0644\u06cc\u0627\u062a \u0622\u0628\u0634\u0627\u0631\u06cc:<\/strong> \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0627 \u0627\u0642\u062f\u0627\u0645\u0627\u062a \u0622\u0628\u0634\u0627\u0631\u06cc\u060c \u0645\u0627\u0646\u0646\u062f CASCADE DELETE \u06cc\u0627 CASCADE UPDATE\u060c \u067e\u06cc\u06a9\u0631\u0628\u0646\u062f\u06cc \u06a9\u0631\u062f \u062a\u0627 \u0628\u0647 \u0637\u0648\u0631 \u062e\u0648\u062f\u06a9\u0627\u0631 \u062a\u063a\u06cc\u06cc\u0631\u0627\u062a \u0631\u0627 \u062f\u0631 \u062c\u062f\u0627\u0648\u0644 \u067e\u06cc\u0648\u0646\u062f \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0645\u0646\u062a\u0634\u0631 \u06a9\u0646\u062f.<\/p>\n<\/li>\n<\/ol>\n<h2>\u0633\u0627\u062e\u062a\u0627\u0631 \u062f\u0627\u062e\u0644\u06cc \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0686\u06af\u0648\u0646\u0647 \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f<\/h2>\n<p>\u062f\u0631 \u062f\u0627\u062e\u0644\u060c \u06cc\u06a9 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u06cc\u0627 \u0645\u062c\u0645\u0648\u0639\u0647 \u0627\u06cc \u0627\u0632 \u0633\u062a\u0648\u0646 \u0647\u0627 \u062f\u0631 \u062c\u062f\u0648\u0644 \u0641\u0631\u0632\u0646\u062f \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u0628\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u062c\u062f\u0648\u0644 \u0648\u0627\u0644\u062f \u0627\u0631\u062c\u0627\u0639 \u0645\u06cc \u062f\u0647\u062f. \u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u06cc\u06a9 \u0631\u06a9\u0648\u0631\u062f \u062c\u062f\u06cc\u062f \u062f\u0631 \u062c\u062f\u0648\u0644 \u0641\u0631\u0632\u0646\u062f \u0648\u0627\u0631\u062f \u0645\u06cc \u0634\u0648\u062f\u060c \u0633\u062a\u0648\u0646 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0628\u0627 \u0645\u0642\u062f\u0627\u0631\u06cc \u067e\u0631 \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u0645\u0637\u0627\u0628\u0642 \u0628\u0627 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u0631\u06a9\u0648\u0631\u062f \u0645\u0631\u0628\u0648\u0637\u0647 \u062f\u0631 \u062c\u062f\u0648\u0644 \u0648\u0627\u0644\u062f \u0627\u0633\u062a. \u0627\u06af\u0631 \u0631\u06a9\u0648\u0631\u062f \u0627\u0631\u062c\u0627\u0639 \u0634\u062f\u0647 \u062f\u0631 \u062c\u062f\u0648\u0644 \u0648\u0627\u0644\u062f \u0627\u0635\u0644\u0627\u062d \u06cc\u0627 \u062d\u0630\u0641 \u0634\u0648\u062f\u060c \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u0627\u0642\u062f\u0627\u0645\u0627\u062a \u0645\u0646\u0627\u0633\u0628 \u0628\u0631\u0627\u06cc \u062d\u0641\u0638 \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u0627\u0631\u062c\u0627\u0639 \u0627\u0646\u062c\u0627\u0645 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/p>\n<p>\u0633\u06cc\u0646\u062a\u06a9\u0633 \u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0634\u0627\u0645\u0644 \u062a\u0639\u0631\u06cc\u0641 \u0631\u0627\u0628\u0637\u0647 \u0628\u06cc\u0646 \u062c\u062f\u0627\u0648\u0644 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062f\u0633\u062a\u0648\u0631\u0627\u062a SQL \u0627\u0633\u062a. \u0645\u062b\u0644\u0627:<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>sql<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>\u06a9\u062f \u0631\u0627 \u06a9\u067e\u06cc \u06a9\u0646\u06cc\u062f<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-sql\" data-no-translation=\"\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> Employees (\n    employee_id <span class=\"hljs-type\">INT<\/span> <span class=\"hljs-keyword\">PRIMARY<\/span> KEY,\n    employee_name <span class=\"hljs-type\">VARCHAR<\/span>(<span class=\"hljs-number\">50<\/span>),\n    department_id <span class=\"hljs-type\">INT<\/span>,\n    <span class=\"hljs-keyword\">FOREIGN<\/span> KEY (department_id) <span class=\"hljs-keyword\">REFERENCES<\/span> Departments(department_id)\n);\n<\/code><\/div><\/div><\/pre>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c <code data-no-translation=\"\">department_id<\/code> \u0633\u062a\u0648\u0646 \u062f\u0631 <code data-no-translation=\"\">Employees<\/code> \u062c\u062f\u0648\u0644 \u06cc\u06a9 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0627\u0633\u062a \u06a9\u0647 \u0628\u0647 \u0622\u0646 \u0627\u0631\u062c\u0627\u0639 \u0645\u06cc \u062f\u0647\u062f <code data-no-translation=\"\">department_id<\/code> \u0633\u062a\u0648\u0646 \u062f\u0631 <code data-no-translation=\"\">Departments<\/code> \u062c\u062f\u0648\u0644.<\/p>\n<h2>\u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc<\/h2>\n<p>\u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f\u06cc \u062e\u0627\u0631\u062c\u06cc \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632:<\/p>\n<ol>\n<li>\n<p><strong>\u0627\u06cc\u062c\u0627\u062f \u0631\u0627\u0628\u0637\u0647:<\/strong> \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0627\u0645\u06a9\u0627\u0646 \u0627\u06cc\u062c\u0627\u062f \u0631\u0648\u0627\u0628\u0637 \u0628\u06cc\u0646 \u062c\u062f\u0627\u0648\u0644 \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u0646\u0645\u0627\u06cc\u0634 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0631\u0627 \u0627\u0645\u06a9\u0627\u0646 \u067e\u0630\u06cc\u0631 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627:<\/strong> \u0628\u0627 \u0627\u0639\u0645\u0627\u0644 \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u0627\u0631\u062c\u0627\u0639\u06cc\u060c \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u0631\u0627 \u062f\u0631 \u062c\u062f\u0627\u0648\u0644 \u0645\u0631\u062a\u0628\u0637 \u062d\u0641\u0638 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648:<\/strong> \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062f\u0631 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0647 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0639\u0645\u0644\u06cc\u0627\u062a \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u062f\u0631 \u0646\u062a\u06cc\u062c\u0647 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u0633\u0631\u06cc\u0639\u062a\u0631 \u0648 \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u067e\u06cc\u0634\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0633\u0648\u0627\u0628\u0642 \u06cc\u062a\u06cc\u0645:<\/strong> \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u0646\u062f \u06a9\u0647 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc \u062c\u062f\u0648\u0644 \u0641\u0631\u0632\u0646\u062f \u0647\u0645\u06cc\u0634\u0647 \u062f\u0627\u0631\u0627\u06cc \u06cc\u06a9 \u0631\u06a9\u0648\u0631\u062f \u0645\u0631\u0628\u0648\u0637\u0647 \u062f\u0631 \u062c\u062f\u0648\u0644 \u0648\u0627\u0644\u062f \u0647\u0633\u062a\u0646\u062f \u0648 \u0627\u0632 \u06cc\u062a\u06cc\u0645 \u0634\u062f\u0646 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0627\u0642\u062f\u0627\u0645\u0627\u062a \u0622\u0628\u0634\u0627\u0631\u06cc:<\/strong> \u062a\u0648\u0627\u0646\u0627\u06cc\u06cc \u067e\u06cc\u06a9\u0631\u0628\u0646\u062f\u06cc \u0627\u0642\u062f\u0627\u0645\u0627\u062a \u0622\u0628\u0634\u0627\u0631\u06cc \u0641\u0631\u0622\u06cc\u0646\u062f \u0645\u062f\u06cc\u0631\u06cc\u062a \u062a\u063a\u06cc\u06cc\u0631\u0627\u062a \u062f\u0631 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u067e\u06cc\u0648\u0646\u062f\u06cc \u0631\u0627 \u0633\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<\/li>\n<\/ol>\n<h2>\u0627\u0646\u0648\u0627\u0639 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc<\/h2>\n<p>\u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0631\u0641\u062a\u0627\u0631 \u0648 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0622\u0646\u0647\u0627 \u062f\u0633\u062a\u0647 \u0628\u0646\u062f\u06cc \u06a9\u0631\u062f. \u0627\u0646\u0648\u0627\u0639 \u0631\u0627\u06cc\u062c \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632:<\/p>\n<ol>\n<li>\n<p><strong>\u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0633\u0627\u062f\u0647:<\/strong> \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0628\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u062c\u062f\u0648\u0644 \u0648\u0627\u0644\u062f \u0627\u0634\u0627\u0631\u0647 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0645\u0631\u06a9\u0628:<\/strong> \u0686\u0646\u062f\u06cc\u0646 \u0633\u062a\u0648\u0646 \u0628\u0627 \u0647\u0645 \u0628\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u062c\u062f\u0648\u0644 \u0648\u0627\u0644\u062f \u0627\u0634\u0627\u0631\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u062e\u0648\u062f \u0627\u0631\u062c\u0627\u0639 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc:<\/strong> \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u062f\u0631 \u06cc\u06a9 \u062c\u062f\u0648\u0644 \u0628\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u0647\u0645\u0627\u0646 \u062c\u062f\u0648\u0644 \u0627\u0631\u062c\u0627\u0639 \u0645\u06cc \u062f\u0647\u062f \u0648 \u06cc\u06a9 \u0631\u0627\u0628\u0637\u0647 \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc \u062f\u0631 \u062e\u0648\u062f \u062c\u062f\u0648\u0644 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<\/li>\n<\/ol>\n<h2>\u0631\u0627\u0647 \u0647\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc\u060c \u0645\u0634\u06a9\u0644\u0627\u062a \u0648 \u0631\u0627\u0647 \u062d\u0644 \u0647\u0627\u06cc \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/h2>\n<h3>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc:<\/h3>\n<ul>\n<li>\u062a\u0639\u0631\u06cc\u0641 \u0631\u0648\u0627\u0628\u0637: \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0628\u0631\u0627\u06cc \u0627\u06cc\u062c\u0627\u062f \u0631\u0648\u0627\u0628\u0637 \u0628\u06cc\u0646 \u062c\u062f\u0627\u0648\u0644 \u0646\u0634\u0627\u0646 \u062f\u0647\u0646\u062f\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0645\u0631\u062a\u0628\u0637 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.<\/li>\n<li>\u062a\u0636\u0645\u06cc\u0646 \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627: \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u0627\u0631\u062c\u0627\u0639\u06cc \u0631\u0627 \u0627\u0639\u0645\u0627\u0644 \u0645\u06cc \u06a9\u0646\u0646\u062f \u0648 \u0627\u0632 \u062b\u0628\u0627\u062a \u062f\u0627\u062f\u0647 \u0647\u0627 \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f.<\/li>\n<\/ul>\n<h3>\u0645\u0634\u06a9\u0644\u0627\u062a \u0648 \u0631\u0627\u0647 \u062d\u0644 \u0647\u0627:<\/h3>\n<ol>\n<li>\n<p><strong>\u0646\u0627\u0647\u0646\u062c\u0627\u0631\u06cc \u0647\u0627\u06cc \u062f\u0631\u062c\/\u062d\u0630\u0641:<\/strong> \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0646\u0627\u062f\u0631\u0633\u062a \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0646\u0627\u0647\u0646\u062c\u0627\u0631\u06cc \u062f\u0631\u062c \u0648 \u062d\u0630\u0641 \u0634\u0648\u062f. \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0627\u06cc\u0646 \u0627\u0645\u0631\u060c \u0627\u0632 \u0627\u0631\u062c\u0627\u0639\u0627\u062a \u062f\u0627\u06cc\u0631\u0647 \u0627\u06cc \u062e\u0648\u062f\u062f\u0627\u0631\u06cc \u06a9\u0646\u06cc\u062f \u0648 \u0627\u0632 \u0627\u0642\u062f\u0627\u0645\u0627\u062a \u0622\u0628\u0634\u0627\u0631\u06cc \u0639\u0627\u0642\u0644\u0627\u0646\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u062a\u0627\u062b\u06cc\u0631 \u0639\u0645\u0644\u06a9\u0631\u062f:<\/strong> \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0628\u06cc\u0634 \u0627\u0632 \u062d\u062f \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u06cc\u0627 \u062a\u0639\u0631\u06cc\u0641 \u0622\u0646\u0647\u0627 \u0628\u0631 \u0631\u0648\u06cc \u0633\u062a\u0648\u0646 \u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0627\u063a\u0644\u0628 \u0628\u0647 \u0631\u0648\u0632 \u0645\u06cc \u0634\u0648\u0646\u062f \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0631 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u062a\u0623\u062b\u06cc\u0631 \u0628\u06af\u0630\u0627\u0631\u062f. \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0628\u0627 \u0627\u062d\u062a\u06cc\u0627\u0637 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f \u0648 \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0631\u0627 \u062f\u0631 \u0646\u0638\u0631 \u0628\u06af\u06cc\u0631\u06cc\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0645\u062f\u06cc\u0631\u06cc\u062a \u0645\u0642\u0627\u062f\u06cc\u0631 NULL:<\/strong> \u0647\u0646\u06af\u0627\u0645 \u0628\u0631\u062e\u0648\u0631\u062f \u0628\u0627 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u063a\u06cc\u0631 \u0642\u0627\u0628\u0644 \u062a\u0647\u06cc\u060c \u0628\u0627\u06cc\u062f \u062f\u0642\u062a \u0648\u06cc\u0698\u0647 \u0627\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0645\u0646\u0627\u0633\u0628 \u0645\u0642\u0627\u062f\u06cc\u0631 NULL \u0635\u0648\u0631\u062a \u06af\u06cc\u0631\u062f.<\/p>\n<\/li>\n<\/ol>\n<h2>\u0645\u0634\u062e\u0635\u0627\u062a \u0627\u0635\u0644\u06cc \u0648 \u0633\u0627\u06cc\u0631 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0647\u0627 \u0628\u0627 \u0627\u0635\u0637\u0644\u0627\u062d\u0627\u062a \u0645\u0634\u0627\u0628\u0647 \u062f\u0631 \u0642\u0627\u0644\u0628 \u062c\u062f\u0627\u0648\u0644 \u0648 \u0641\u0647\u0631\u0633\u062a<\/h2>\n<table>\n<thead>\n<tr>\n<th><strong>\u0645\u0634\u062e\u0635\u0647<\/strong><\/th>\n<th><strong>\u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc<\/strong><\/th>\n<th><strong>\u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc<\/strong><\/th>\n<th><strong>\u06a9\u0644\u06cc\u062f \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0647\u062f\u0641<\/td>\n<td>\u0628\u0627 \u0627\u0631\u062c\u0627\u0639 \u0628\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u062c\u062f\u0648\u0644 \u062f\u06cc\u06af\u0631\u06cc\u060c \u0631\u0627\u0628\u0637\u0647 \u0627\u06cc \u0628\u06cc\u0646 \u062c\u062f\u0627\u0648\u0644 \u0628\u0631\u0642\u0631\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f.<\/td>\n<td>\u0628\u0647 \u0637\u0648\u0631 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0647\u0631 \u0631\u06a9\u0648\u0631\u062f \u0631\u0627 \u062f\u0631 \u062c\u062f\u0648\u0644 \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u0645\u06cc \u06a9\u0646\u062f.<\/td>\n<td>\u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0628\u0648\u062f\u0646 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062f\u0631 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0631\u0627 \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u062f.<\/td>\n<\/tr>\n<tr>\n<td>\u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0628\u0648\u062f\u0646<\/td>\n<td>\u0644\u0632\u0648\u0645\u0627 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0646\u06cc\u0633\u062a. \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0686\u0646\u062f\u06cc\u0646 \u0631\u062f\u06cc\u0641 \u0645\u0642\u062f\u0627\u0631 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u06cc\u06a9\u0633\u0627\u0646\u06cc \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u0646\u062f.<\/td>\n<td>\u0645\u0646\u062d\u0635\u0631 \u0628\u0641\u0631\u062f\u061b \u0647\u0631 \u0631\u062f\u06cc\u0641 \u062f\u0627\u0631\u0627\u06cc \u06cc\u06a9 \u0645\u0642\u062f\u0627\u0631 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u0645\u062c\u0632\u0627 \u0627\u0633\u062a.<\/td>\n<td>\u0645\u0646\u062d\u0635\u0631 \u0628\u0641\u0631\u062f\u061b \u0647\u0631 \u0633\u0637\u0631 \u062f\u0627\u0631\u0627\u06cc \u06cc\u06a9 \u0645\u0642\u062f\u0627\u0631 \u06a9\u0644\u06cc\u062f \u0645\u062c\u0632\u0627 \u0627\u0633\u062a.<\/td>\n<\/tr>\n<tr>\n<td>\u0645\u0642\u0627\u062f\u06cc\u0631 \u062a\u0647\u06cc<\/td>\n<td>\u0628\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062a\u0647\u06cc \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0631\u0648\u0627\u0628\u0637 \u0627\u0632 \u062f\u0633\u062a \u0631\u0641\u062a\u0647 \u0631\u0627 \u0646\u0634\u0627\u0646 \u062f\u0647\u0646\u062f.<\/td>\n<td>\u0645\u0642\u0627\u062f\u06cc\u0631 null \u0631\u0627 \u0627\u062c\u0627\u0632\u0647 \u0646\u0645\u06cc \u062f\u0647\u062f. \u0628\u0627\u06cc\u062f \u0628\u0631\u0627\u06cc \u0647\u0631 \u0631\u062f\u06cc\u0641 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f.<\/td>\n<td>\u0628\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062a\u0647\u06cc \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u062f\u060c \u0627\u0645\u0627 \u0641\u0642\u0637 \u06cc\u06a9 \u0633\u0637\u0631 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0642\u062f\u0627\u0631 \u06a9\u0644\u06cc\u062f \u062a\u0647\u06cc \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f.<\/td>\n<\/tr>\n<tr>\n<td>\u062a\u0639\u062f\u0627\u062f \u0631\u062e\u062f\u0627\u062f\u0647\u0627<\/td>\n<td>\u0686\u0646\u062f\u06cc\u0646 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u062f\u0631 \u06cc\u06a9 \u062c\u062f\u0648\u0644 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u0646\u062f.<\/td>\n<td>\u0641\u0642\u0637 \u06cc\u06a9 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u062f\u0631 \u06cc\u06a9 \u062c\u062f\u0648\u0644 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f.<\/td>\n<td>\u0641\u0642\u0637 \u06cc\u06a9 \u06a9\u0644\u06cc\u062f Unique \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u062f\u0631 \u06cc\u06a9 \u062c\u062f\u0648\u0644 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f.<\/td>\n<\/tr>\n<tr>\n<td>\u0631\u0627\u0628\u0637\u0647 \u0628\u0627 \u062f\u0627\u062f\u0647 \u0647\u0627<\/td>\n<td>\u062f\u0631 \u062c\u062f\u0648\u0644 \u062f\u06cc\u06af\u0631\u06cc \u0628\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u067e\u06cc\u0648\u0646\u062f \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/td>\n<td>\u0628\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0645\u0648\u062c\u0648\u062f \u062f\u0631 \u0647\u0645\u0627\u0646 \u062c\u062f\u0648\u0644 \u067e\u06cc\u0648\u0646\u062f \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/td>\n<td>\u0628\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0645\u0648\u062c\u0648\u062f \u062f\u0631 \u0647\u0645\u0627\u0646 \u062c\u062f\u0648\u0644 \u06cc\u0627 \u062c\u062f\u0648\u0644 \u062f\u06cc\u06af\u0631\u06cc \u067e\u06cc\u0648\u0646\u062f \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u062f\u06cc\u062f\u06af\u0627\u0647 \u0647\u0627 \u0648 \u0641\u0646\u0627\u0648\u0631\u06cc \u0647\u0627\u06cc \u0622\u06cc\u0646\u062f\u0647 \u0645\u0631\u062a\u0628\u0637 \u0628\u0627 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc<\/h2>\n<p>\u0622\u06cc\u0646\u062f\u0647 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062f\u0631 \u0627\u062f\u0627\u0645\u0647 \u0646\u0642\u0634 \u0622\u0646\u0647\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0633\u0646\u06af \u0628\u0646\u0627\u06cc \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0631\u0627\u0628\u0637\u0647 \u0627\u06cc \u0646\u0647\u0641\u062a\u0647 \u0627\u0633\u062a. \u0628\u0627 \u067e\u06cc\u0634\u0631\u0641\u062a \u0641\u0646\u0627\u0648\u0631\u06cc\u060c \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0647\u0628\u0648\u062f\u0647\u0627 \u0648 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0647\u0627\u06cc\u06cc \u0631\u0627 \u0628\u0631\u0627\u06cc \u0627\u0641\u0632\u0627\u06cc\u0634 \u0639\u0645\u0644\u06a9\u0631\u062f \u0648 \u0642\u0627\u0628\u0644\u06cc\u062a \u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0627\u0631\u0627\u0626\u0647 \u062f\u0647\u0646\u062f. \u0628\u0631\u062e\u06cc \u0627\u0632 \u067e\u06cc\u0634\u0631\u0641\u062a \u0647\u0627\u06cc \u0628\u0627\u0644\u0642\u0648\u0647 \u0622\u06cc\u0646\u062f\u0647 \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632:<\/p>\n<ol>\n<li>\n<p><strong>\u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u062e\u0648\u062f\u06a9\u0627\u0631:<\/strong> \u0627\u0644\u06af\u0648\u0631\u06cc\u062a\u0645\u200c\u0647\u0627\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u0648 \u0627\u06cc\u062c\u0627\u062f \u0646\u0645\u0627\u06cc\u0647\u200c\u0647\u0627 \u062f\u0631 \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0631\u0627 \u062e\u0648\u062f\u06a9\u0627\u0631 \u06a9\u0646\u0646\u062f \u0648 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0628\u0647\u06cc\u0646\u0647 \u06a9\u0646\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u062a\u06a9\u0631\u0627\u0631 \u0648 \u062a\u0642\u0633\u06cc\u0645 \u06a9\u0627\u0631\u0622\u0645\u062f:<\/strong> \u0646\u0648\u0622\u0648\u0631\u06cc\u200c\u0647\u0627 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0627\u0645\u06a9\u0627\u0646 \u062a\u06a9\u0631\u0627\u0631 \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0648 \u0627\u0633\u062a\u0631\u0627\u062a\u0698\u06cc\u200c\u0647\u0627\u06cc \u0627\u0634\u062a\u0631\u0627\u06a9\u200c\u06af\u0630\u0627\u0631\u06cc \u0634\u0627\u0645\u0644 \u062c\u062f\u0627\u0648\u0644 \u0628\u0627 \u0631\u0648\u0627\u0628\u0637 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u06a9\u0646\u0646\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0646\u0645\u0648\u062f\u0627\u0631\u06cc:<\/strong> \u0638\u0647\u0648\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647\u200c\u0647\u0627\u06cc \u0627\u0637\u0644\u0627\u0639\u0627\u062a\u06cc \u06af\u0631\u0627\u0641 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0631\u0627\u0647\u200c\u0647\u0627\u06cc \u062c\u062f\u06cc\u062f\u06cc \u0631\u0627 \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u0627\u0628\u0637 \u0628\u06cc\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0645\u0639\u0631\u0641\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u0628\u0647 \u0637\u0648\u0631 \u0628\u0627\u0644\u0642\u0648\u0647 \u0645\u0641\u0647\u0648\u0645 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0631\u0627 \u062f\u0631 \u0632\u0645\u06cc\u0646\u0647\u200c\u0647\u0627\u06cc \u063a\u06cc\u0631 \u0631\u0627\u0628\u0637\u0647\u200c\u0627\u06cc \u0628\u0627\u0632\u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/p>\n<\/li>\n<\/ol>\n<h2>\u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0627\u0632 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f \u06cc\u0627 \u0628\u0627 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0645\u0631\u062a\u0628\u0637 \u0634\u062f<\/h2>\n<p>\u062f\u0631 \u0632\u0645\u06cc\u0646\u0647 \u0627\u0631\u0627\u0626\u0647\u200c\u062f\u0647\u0646\u062f\u0647 \u0633\u0631\u0648\u0631 \u067e\u0631\u0627\u06a9\u0633\u06cc \u0645\u0627\u0646\u0646\u062f OneProxy (oneproxy.pro)\u060c \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0647 \u0635\u0648\u0631\u062a \u062f\u0627\u062e\u0644\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0627\u0631\u062a\u0628\u0627\u0637 \u0628\u06cc\u0646 \u062c\u062f\u0627\u0648\u0644 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0645\u062e\u062a\u0644\u0641 \u062d\u0627\u0648\u06cc \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u062d\u0633\u0627\u0628\u200c\u0647\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631\u060c \u0637\u0631\u062d\u200c\u0647\u0627\u06cc \u0627\u0634\u062a\u0631\u0627\u06a9\u060c \u062c\u0632\u0626\u06cc\u0627\u062a \u0635\u0648\u0631\u062a\u200c\u062d\u0633\u0627\u0628 \u0648 \u0645\u06a9\u0627\u0646\u200c\u0647\u0627\u06cc \u0633\u0631\u0648\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u0648\u0646\u062f. \u0645\u062b\u0644\u0627:<\/p>\n<ul>\n<li>\u06cc\u06a9 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0631\u0627\u06cc \u067e\u06cc\u0648\u0646\u062f \u062f\u0627\u062f\u0646 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u062d\u0633\u0627\u0628 \u06a9\u0627\u0631\u0628\u0631 \u0628\u0647 \u0637\u0631\u062d \u0627\u0634\u062a\u0631\u0627\u06a9 \u0645\u0631\u0628\u0648\u0637\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u0648\u062f.<\/li>\n<li>\u06cc\u06a9 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u062f\u06cc\u06af\u0631 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0631\u0627\u0628\u0637\u0647 \u0627\u06cc \u0628\u06cc\u0646 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631 \u0648 \u0645\u06a9\u0627\u0646 \u0633\u0631\u0648\u0631 \u0627\u0646\u062a\u062e\u0627\u0628\u06cc \u0622\u0646\u0647\u0627 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u062f.<\/li>\n<\/ul>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc\u060c OneProxy \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0627\u0632 \u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u060c \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u0627\u0631\u062c\u0627\u0639\u06cc \u0648 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u06a9\u0627\u0631\u0622\u0645\u062f \u062f\u0627\u062f\u0647 \u0647\u0627 \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u062e\u0648\u062f \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u062d\u0627\u0635\u0644 \u06a9\u0646\u062f \u0648 \u0628\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u06cc\u06a9\u067e\u0627\u0631\u0686\u0647 \u0633\u0631\u0648\u06cc\u0633 \u067e\u0631\u0648\u06a9\u0633\u06cc \u062e\u0648\u062f \u06a9\u0645\u06a9 \u06a9\u0646\u062f.<\/p>\n<h2>\u0644\u06cc\u0646\u06a9 \u0647\u0627\u06cc \u0645\u0631\u0628\u0648\u0637\u0647<\/h2>\n<p>\u0628\u0631\u0627\u06cc \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0628\u06cc\u0634\u062a\u0631 \u062f\u0631 \u0645\u0648\u0631\u062f \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc\u060c \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0645\u0646\u0627\u0628\u0639 \u0632\u06cc\u0631 \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u062f:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.w3schools.com\/sql\/sql_foreignkey.asp\" target=\"_new\" rel=\"noopener nofollow\">\u0645\u0642\u062f\u0645\u0647 \u0627\u06cc \u0628\u0631 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062f\u0631 SQL<\/a><\/li>\n<li><a href=\"https:\/\/www.sqlshack.com\/understanding-the-sql-server-foreign-key\/\" target=\"_new\" rel=\"noopener nofollow\">\u0622\u0634\u0646\u0627\u06cc\u06cc \u0628\u0627 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062f\u0631 \u0645\u062f\u06cc\u0631\u06cc\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647<\/a><\/li>\n<li><a href=\"https:\/\/www.ibm.com\/docs\/en\/informix-servers\/12.10?topic=keys-using-foreign-keys-data-integrity\" target=\"_new\" rel=\"noopener nofollow\">\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0628\u0631\u0627\u06cc \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627<\/a><\/li>\n<\/ul>\n<p>\u062f\u0631 \u0646\u062a\u06cc\u062c\u0647\u060c \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u062c\u0632\u0621 \u062d\u06cc\u0627\u062a\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647\u200c\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0631\u0627\u0628\u0637\u0647\u200c\u0627\u06cc \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u0627\u0645\u06a9\u0627\u0646 \u0628\u0631\u0642\u0631\u0627\u0631\u06cc \u0631\u0648\u0627\u0628\u0637 \u0628\u06cc\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0648 \u062a\u0636\u0645\u06cc\u0646 \u06cc\u06a9\u067e\u0627\u0631\u0686\u06af\u06cc \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f. \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u067e\u0627\u06cc\u06af\u0627\u0647\u200c\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0648 \u0641\u0646\u0627\u0648\u0631\u06cc \u0628\u0647 \u062a\u06a9\u0627\u0645\u0644 \u062e\u0648\u062f \u0627\u062f\u0627\u0645\u0647 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f\u060c \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u06cc\u06a9 \u0627\u0628\u0632\u0627\u0631 \u0636\u0631\u0648\u0631\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0648 \u0633\u0627\u0632\u0645\u0627\u0646\u062f\u0647\u06cc \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u067e\u06cc\u0686\u06cc\u062f\u0647 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641\u060c \u0627\u0632 \u062c\u0645\u0644\u0647 \u0627\u0631\u0627\u0626\u0647\u200c\u062f\u0647\u0646\u062f\u06af\u0627\u0646 \u0633\u0631\u0648\u0631 \u067e\u0631\u0648\u06a9\u0633\u06cc \u0645\u0627\u0646\u0646\u062f OneProxy \u0628\u0627\u0642\u06cc \u062e\u0648\u0627\u0647\u0646\u062f \u0645\u0627\u0646\u062f.<\/p>","protected":false},"featured_media":468433,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477274","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Foreign Key: A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is a Foreign key and why is it important in databases?","answer":"<p>A Foreign key is a crucial concept in database management systems that establishes a relationship between two tables. It ensures data integrity by linking the primary key of one table to a corresponding field in another table. This linkage enables meaningful associations between data, facilitates data retrieval, and prevents inconsistent or invalid data from being inserted.<\/p>"},{"question":"Who introduced the concept of Foreign keys?","answer":"<p>The concept of Foreign keys was first introduced by E.F. Codd in his seminal paper titled \"A Relational Model of Data for Large Shared Data Banks\" published in 1970. Codd's work laid the foundation for the relational database model, and Foreign keys emerged as a key component.<\/p>"},{"question":"How does a Foreign key work internally?","answer":"<p>Internally, a Foreign key is implemented as a column or set of columns in the child table that references the primary key of the parent table. When new data is inserted into the child table, the Foreign key column is populated with a value corresponding to the primary key of the related record in the parent table. If the referenced record in the parent table is modified or deleted, the Foreign key ensures that appropriate actions are taken to maintain referential integrity.<\/p>"},{"question":"What are the main features of Foreign keys?","answer":"<p>The key features of Foreign keys include establishing data relationships, ensuring data consistency, optimizing query performance, and facilitating cascading actions for data changes across linked tables.<\/p>"},{"question":"What are the different types of Foreign keys?","answer":"<p>Foreign keys can be classified into three main types: Simple Foreign keys (with a single column), Composite Foreign keys (with multiple columns), and Self-referencing Foreign keys (where a column in a table references the primary key of the same table).<\/p>"},{"question":"How can Foreign keys be used, and what are the potential issues?","answer":"<p>Foreign keys are used to establish meaningful relationships between tables and ensure data integrity. However, improper use can lead to insertion and deletion anomalies and impact database performance. Care should be taken when handling NULL values in Foreign keys, and circular references should be avoided.<\/p>"},{"question":"How do Foreign keys compare to Primary keys and Unique keys?","answer":"<p>Foreign keys establish relationships between tables, Primary keys uniquely identify records in a table, and Unique keys ensure the uniqueness of values in a column. Each has its own distinct purpose and characteristics.<\/p>"},{"question":"What are the future perspectives of Foreign keys in databases?","answer":"<p>In the future, advancements in database technology may introduce automated indexing, more efficient replication, and the use of Foreign keys in non-relational contexts like graph databases.<\/p>"},{"question":"How are proxy servers associated with Foreign keys?","answer":"<p>Proxy server providers like OneProxy may use Foreign keys internally to manage relationships between various database tables containing user accounts, subscription plans, billing details, and server locations. This ensures seamless operation and data integrity in their proxy services.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/wiki\/477274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/wiki\/477274\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/media\/468433"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/media?parent=477274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}