{"id":478659,"date":"2023-08-09T09:36:38","date_gmt":"2023-08-09T09:36:38","guid":{"rendered":""},"modified":"2023-09-05T11:17:18","modified_gmt":"2023-09-05T11:17:18","slug":"recursive-common-table-expressions-ctes","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/ir\/wiki\/recursive-common-table-expressions-ctes\/","title":{"rendered":"\u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs)"},"content":{"rendered":"<p>\u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0645\u062e\u062a\u0635\u0631\u06cc \u062f\u0631\u0628\u0627\u0631\u0647 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs)<\/p>\n<p>\u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs) \u06cc\u06a9 \u0648\u06cc\u0698\u06af\u06cc \u0642\u062f\u0631\u062a\u0645\u0646\u062f SQL \u0627\u0633\u062a \u06a9\u0647 \u0631\u0627\u0647\u06cc \u0628\u0631\u0627\u06cc \u0627\u06cc\u062c\u0627\u062f \u0645\u062c\u0645\u0648\u0639\u0647\u200c\u0647\u0627\u06cc \u0646\u062a\u0627\u06cc\u062c \u0645\u0648\u0642\u062a\u06cc \u06a9\u0647 \u062f\u0631 \u06cc\u06a9 \u0639\u0628\u0627\u0631\u062a SELECT\u060c INSERT\u060c UPDATE \u06cc\u0627 DELETE \u0627\u0631\u062c\u0627\u0639 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f\u060c \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc\u200c\u06a9\u0646\u062f. CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0631\u0627 \u0641\u0639\u0627\u0644 \u0645\u06cc \u06a9\u0646\u0646\u062f \u0648 \u0641\u0631\u0622\u06cc\u0646\u062f \u062c\u0633\u062a\u062c\u0648\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc \u0645\u0627\u0646\u0646\u062f \u0646\u0645\u0648\u062f\u0627\u0631\u0647\u0627\u06cc \u0633\u0627\u0632\u0645\u0627\u0646\u06cc\u060c \u0633\u0627\u062e\u062a\u0627\u0631 \u067e\u0648\u0634\u0647 \u0647\u0627 \u06cc\u0627 \u062f\u0631\u062e\u062a\u0627\u0646 \u062e\u0627\u0646\u0648\u0627\u062f\u06af\u06cc \u0631\u0627 \u0633\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n<h2>\u062a\u0627\u0631\u06cc\u062e\u0686\u0647 \u067e\u06cc\u062f\u0627\u06cc\u0634 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs) \u0648 \u0627\u0648\u0644\u06cc\u0646 \u0630\u06a9\u0631 \u0622\u0646<\/h2>\n<p>CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0628\u062e\u0634\u06cc \u0627\u0632 \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f SQL:1999 \u0645\u0639\u0631\u0641\u06cc \u0634\u062f\u0646\u062f \u0648 \u0628\u0647 \u0637\u0648\u0631 \u06af\u0633\u062a\u0631\u062f\u0647 \u062a\u0648\u0633\u0637 \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0627\u0635\u0644\u06cc\u060c \u0627\u0632 \u062c\u0645\u0644\u0647 PostgreSQL\u060c Microsoft SQL Server \u0648 Oracle \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0634\u062f\u0646\u062f. \u0645\u0639\u0631\u0641\u06cc CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647\u06cc \u0631\u0627 \u062f\u0631 \u062a\u0648\u0627\u0646\u0627\u06cc\u06cc \u06a9\u0627\u0631 \u0628\u0627 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc \u0646\u0634\u0627\u0646 \u062f\u0627\u062f \u0648 \u0631\u0627\u0647\u06cc \u0628\u0631\u0627\u06cc \u0627\u0646\u062c\u0627\u0645 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06cc\u06a9 \u0646\u062d\u0648 \u0627\u0639\u0644\u0627\u0646\u06cc \u062a\u0631 \u0648 \u062e\u0648\u0627\u0646\u062f\u0646\u06cc \u062a\u0631 \u0627\u0631\u0627\u0626\u0647 \u062f\u0627\u062f.<\/p>\n<h2>\u0627\u0637\u0644\u0627\u0639\u0627\u062a \u062f\u0642\u06cc\u0642 \u062f\u0631 \u0645\u0648\u0631\u062f \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs). \u06af\u0633\u062a\u0631\u0634 \u0645\u0648\u0636\u0648\u0639 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs)<\/h2>\n<p>CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06cc\u06a9 \u0639\u0628\u0627\u0631\u062a WITH \u0648 \u0628\u0647 \u062f\u0646\u0628\u0627\u0644 \u0622\u0646 \u06cc\u06a9 \u0639\u0628\u0627\u0631\u062a SELECT \u06a9\u0647 \u0628\u0647 \u062e\u0648\u062f\u0634 \u0627\u0634\u0627\u0631\u0647 \u062f\u0627\u0631\u062f\u060c \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u0634\u0648\u062f. CTE \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0627\u0632 \u062f\u0648 \u0628\u062e\u0634 \u062a\u0634\u06a9\u06cc\u0644 \u0634\u062f\u0647 \u0627\u0633\u062a:<\/p>\n<ol>\n<li><strong>\u0639\u0636\u0648 \u0644\u0646\u06af\u0631:<\/strong> \u06cc\u06a9 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0627\u0633\u0627\u0633\u06cc \u06a9\u0647 \u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u067e\u0627\u06cc\u0647 \u0631\u0627 \u062a\u0634\u06a9\u06cc\u0644 \u0645\u06cc \u062f\u0647\u062f.<\/li>\n<li><strong>\u0639\u0636\u0648 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc:<\/strong> \u067e\u0631\u0633 \u0648 \u062c\u0648\u06cc \u06a9\u0647 \u0628\u0647 \u062e\u0648\u062f CTE \u0627\u0634\u0627\u0631\u0647 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0631\u062f\u06cc\u0641 \u0647\u0627\u06cc \u0627\u0636\u0627\u0641\u06cc \u062a\u0648\u0644\u06cc\u062f \u0645\u06cc \u06a9\u0646\u062f \u0648 \u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0631\u0627 \u06af\u0633\u062a\u0631\u0634 \u0645\u06cc \u062f\u0647\u062f.<\/li>\n<\/ol>\n<p>\u0627\u06cc\u0646 \u0628\u0647 CTE \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0631\u0648\u06cc \u062e\u0648\u062f\u0634 \u062a\u06a9\u0631\u0627\u0631 \u0634\u0648\u062f \u0648 \u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u062d\u0644\u0642\u0647 \u0645\u0627\u0646\u0646\u062f \u06af\u0633\u062a\u0631\u0634 \u062f\u0647\u062f.<\/p>\n<h2>\u0633\u0627\u062e\u062a\u0627\u0631 \u062f\u0627\u062e\u0644\u06cc \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs). \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs) \u0686\u06af\u0648\u0646\u0647 \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f<\/h2>\n<p>\u0633\u0627\u062e\u062a\u0627\u0631 \u062f\u0627\u062e\u0644\u06cc \u06cc\u06a9 CTE \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0647 \u0645\u0631\u0627\u062d\u0644 \u0632\u06cc\u0631 \u062a\u0642\u0633\u06cc\u0645 \u06a9\u0631\u062f:<\/p>\n<ol>\n<li><strong>\u0645\u0642\u062f\u0627\u0631\u062f\u0647\u06cc \u0627\u0648\u0644\u06cc\u0647:<\/strong> \u0639\u0636\u0648 \u0644\u0646\u06af\u0631 \u0628\u0631\u0627\u06cc \u0627\u06cc\u062c\u0627\u062f \u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0627\u0648\u0644\u06cc\u0647 \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f.<\/li>\n<li><strong>\u0628\u0627\u0632\u06af\u0634\u062a:<\/strong> \u0639\u0636\u0648 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0628\u0627\u0631\u0647\u0627 \u0648 \u0628\u0627\u0631\u0647\u0627 \u0628\u0627 \u0627\u0634\u0627\u0631\u0647 \u0628\u0647 \u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0641\u0639\u0644\u06cc CTE \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f \u062a\u0627 \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u0647\u06cc\u0686 \u0631\u062f\u06cc\u0641 \u062c\u062f\u06cc\u062f\u06cc \u0627\u0636\u0627\u0641\u0647 \u0646\u0634\u0648\u062f.<\/li>\n<li><strong>\u062e\u0627\u062a\u0645\u0647 \u062f\u0627\u062f\u0646:<\/strong> \u0628\u0627\u0632\u06af\u0634\u062a \u0632\u0645\u0627\u0646\u06cc \u0645\u062a\u0648\u0642\u0641 \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u0647\u06cc\u0686 \u0631\u062f\u06cc\u0641 \u0627\u0636\u0627\u0641\u06cc \u062a\u0648\u0644\u06cc\u062f \u0646\u0634\u0648\u062f.<\/li>\n<\/ol>\n<p>\u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0646\u0647\u0627\u06cc\u06cc CTE \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0634\u0627\u0645\u0644 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u062a\u0645\u0627\u0645 \u0631\u062f\u06cc\u0641 \u0647\u0627\u06cc \u062a\u0648\u0644\u06cc\u062f \u0634\u062f\u0647 \u062f\u0631 \u0637\u06cc \u0645\u0631\u0627\u062d\u0644 \u0627\u0648\u0644\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0648 \u0628\u0627\u0632\u06af\u0634\u062a \u0627\u0633\u062a.<\/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\u06cc \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs)<\/h2>\n<ul>\n<li><strong>\u062e\u0648\u0627\u0646\u0627\u06cc\u06cc:<\/strong> \u0628\u0627 \u06a9\u067e\u0633\u0648\u0644\u0647 \u06a9\u0631\u062f\u0646 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647\u060c CTE\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u062e\u0648\u0627\u0646\u0627\u06cc\u06cc \u06a9\u062f \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0645\u06cc \u0628\u062e\u0634\u0646\u062f.<\/li>\n<li><strong>\u0642\u0627\u0628\u0644\u06cc\u062a \u0646\u06af\u0647\u062f\u0627\u0631\u06cc:<\/strong> CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u062a\u063a\u06cc\u06cc\u0631\u0627\u062a \u06a9\u062f \u0631\u0627 \u0622\u0633\u0627\u0646 \u062a\u0631 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/li>\n<li><strong>\u0627\u0646\u0639\u0637\u0627\u0641 \u067e\u0630\u06cc\u0631\u06cc:<\/strong> CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0631\u0648\u0634\u06cc \u0633\u0627\u062e\u062a\u0627\u0631\u06cc\u0627\u0641\u062a\u0647 \u0628\u0631\u0627\u06cc \u0627\u0646\u062c\u0627\u0645 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0628\u062f\u0648\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062c\u062f\u0627\u0648\u0644 \u06cc\u0627 \u0645\u06a9\u0627\u0646 \u0646\u0645\u0627\u0647\u0627\u06cc \u0645\u0648\u0642\u062a\u06cc \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u0646\u062f.<\/li>\n<\/ul>\n<h2>\u0686\u0647 \u0627\u0646\u0648\u0627\u0639 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs) \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f. \u0627\u0632 \u062c\u062f\u0627\u0648\u0644 \u0648 \u0644\u06cc\u0633\u062a \u0647\u0627 \u0628\u0631\u0627\u06cc \u0646\u0648\u0634\u062a\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f<\/h2>\n<h3>\u0627\u0639\u0636\u0627\u06cc \u0644\u0646\u06af\u0631<\/h3>\n<ul>\n<li><strong>\u0627\u0635\u0637\u0644\u0627\u062d \u063a\u06cc\u0631 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc:<\/strong> \u0639\u0628\u0627\u0631\u062a SELECT \u0627\u0635\u0644\u06cc \u06a9\u0647 CTE \u0631\u0627 \u0622\u063a\u0627\u0632 \u0645\u06cc \u06a9\u0646\u062f.<\/li>\n<li><strong>UNION \u06cc\u0627 UNION ALL:<\/strong> \u0646\u062a\u0627\u06cc\u062c \u062d\u0627\u0635\u0644 \u0627\u0632 \u0639\u0628\u0627\u0631\u062a \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0648 \u063a\u06cc\u0631 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0631\u0627 \u062a\u0631\u06a9\u06cc\u0628 \u0645\u06cc \u06a9\u0646\u062f.<\/li>\n<\/ul>\n<h3>\u0627\u0639\u0636\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc<\/h3>\n<ul>\n<li><strong>\u062e\u0648\u062f \u0645\u0631\u062c\u0639:<\/strong> CTE \u062e\u0648\u062f \u0631\u0627 \u0628\u0631\u0627\u06cc \u06af\u0633\u062a\u0631\u0634 \u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0627\u0631\u062c\u0627\u0639 \u0645\u06cc \u062f\u0647\u062f.<\/li>\n<\/ul>\n<h3>\u0627\u0644\u06af\u0648\u0631\u06cc\u062a\u0645 \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0645\u06cc \u0634\u0648\u062f<\/h3>\n<ul>\n<li><strong>\u067e\u06cc\u0645\u0627\u06cc\u0634 \u062f\u0631\u062e\u062a\u0627\u0646:<\/strong> \u067e\u06cc\u0634 \u0633\u0641\u0627\u0631\u0634\u060c \u067e\u0633 \u0627\u0632 \u0633\u0641\u0627\u0631\u0634 \u0648 \u063a\u06cc\u0631\u0647<\/li>\n<li><strong>\u0627\u0644\u06af\u0648\u0631\u06cc\u062a\u0645 \u0647\u0627\u06cc \u0646\u0645\u0648\u062f\u0627\u0631:<\/strong> \u062c\u0633\u062a\u062c\u0648\u06cc \u0627\u0648\u0644 \u0639\u0645\u0642\u060c \u062c\u0633\u062a\u062c\u0648\u06cc \u0627\u0648\u0644 \u0639\u0631\u0636\u06cc \u0648 \u063a\u06cc\u0631\u0647.<\/li>\n<\/ul>\n<h2>\u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs)\u060c \u0645\u0633\u0627\u0626\u0644 \u0648 \u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0622\u0646\u0647\u0627 \u0645\u0631\u062a\u0628\u0637 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/h2>\n<h3>\u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/h3>\n<ul>\n<li><strong>\u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc:<\/strong> \u062d\u0631\u06a9\u062a \u062f\u0631 \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u062f\u0631\u062e\u062a \u0645\u0627\u0646\u0646\u062f<\/li>\n<li><strong>\u062a\u062d\u0644\u06cc\u0644 \u0645\u0633\u06cc\u0631:<\/strong> \u06cc\u0627\u0641\u062a\u0646 \u0645\u0633\u06cc\u0631\u0647\u0627 \u062f\u0631 \u0646\u0645\u0648\u062f\u0627\u0631\u0647\u0627<\/li>\n<li><strong>\u062a\u0628\u062f\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627:<\/strong> \u062a\u0628\u062f\u06cc\u0644 \u0648 \u062f\u0633\u062a\u06a9\u0627\u0631\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647<\/li>\n<\/ul>\n<h3>\u0686\u0627\u0644\u0634 \u0647\u0627 \u0648 \u0645\u0633\u0627\u0626\u0644<\/h3>\n<ul>\n<li><strong>\u062d\u0644\u0642\u0647 \u0628\u06cc \u0646\u0647\u0627\u06cc\u062a:<\/strong> \u0627\u06af\u0631 \u0634\u0631\u0637 \u067e\u0627\u06cc\u0627\u0646 \u0648\u062c\u0648\u062f \u0646\u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f\u060c \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0637\u0648\u0631 \u0646\u0627\u0645\u062d\u062f\u0648\u062f \u062d\u0644\u0642\u0647 \u0628\u0632\u0646\u062f.<\/li>\n<li><strong>\u0645\u0633\u0627\u0626\u0644 \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f:<\/strong> \u0628\u0627\u0632\u06af\u0634\u062a \u0646\u0627\u06a9\u0627\u0631\u0622\u0645\u062f \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0645\u0634\u06a9\u0644\u0627\u062a \u0639\u0645\u0644\u06a9\u0631\u062f \u0634\u0648\u062f.<\/li>\n<\/ul>\n<h3>\u0631\u0627\u0647 \u062d\u0644 \u0647\u0627<\/h3>\n<ul>\n<li><strong>\u0628\u0631\u0631\u0633\u06cc \u067e\u0627\u06cc\u0627\u0646 \u06a9\u0627\u0631:<\/strong> \u0628\u0631\u0627\u06cc \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u062e\u0627\u062a\u0645\u0647 \u0628\u0627\u0632\u06af\u0634\u062a\u060c \u0634\u0631\u0627\u06cc\u0637 \u0645\u0646\u0627\u0633\u0628 \u0631\u0627 \u0627\u0639\u0645\u0627\u0644 \u06a9\u0646\u06cc\u062f.<\/li>\n<li><strong>\u0628\u0647\u064a\u0646\u0647 \u0633\u0627\u0632\u064a:<\/strong> \u062a\u06a9\u0646\u06cc\u06a9 \u0647\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0648 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u0631\u0627 \u0627\u0641\u0632\u0627\u06cc\u0634 \u062f\u0647\u0646\u062f.<\/li>\n<\/ul>\n<h2>\u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u0627\u0635\u0644\u06cc \u0648 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0647\u0627\u06cc \u062f\u06cc\u06af\u0631 \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>\u0648\u06cc\u0698\u06af\u06cc<\/th>\n<th>CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc<\/th>\n<th>\u062c\u062f\u0627\u0648\u0644 \u0645\u0648\u0642\u062a<\/th>\n<th>\u0646\u0634\u0627\u0646\u06af\u0631\u0647\u0627<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0646\u062d\u0648\u06cc<\/td>\n<td>\u0645\u062a\u0648\u0633\u0637<\/td>\n<td>\u0628\u0627\u0644\u0627<\/td>\n<td>\u0628\u0627\u0644\u0627<\/td>\n<\/tr>\n<tr>\n<td>\u06a9\u0627\u0631\u0627\u06cc\u06cc<\/td>\n<td>\u062e\u0648\u0628<\/td>\n<td>\u0645\u062a\u063a\u06cc\u0631<\/td>\n<td>\u0627\u063a\u0644\u0628 \u0622\u0647\u0633\u062a\u0647<\/td>\n<\/tr>\n<tr>\n<td>\u062e\u0648\u0627\u0646\u0627\u06cc\u06cc<\/td>\n<td>\u0628\u0627\u0644\u0627<\/td>\n<td>\u0645\u062a\u0648\u0633\u0637<\/td>\n<td>\u06a9\u0645<\/td>\n<\/tr>\n<tr>\n<td>\u0642\u0627\u0628\u0644\u06cc\u062a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062f\u0631 \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628<\/td>\n<td>\u0639\u0627\u0644\u06cc<\/td>\n<td>\u062e\u0648\u0628<\/td>\n<td>\u0646\u0645\u0627\u06cc\u0634\u06af\u0627\u0647<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u062f\u06cc\u062f\u06af\u0627\u0647\u200c\u0647\u0627 \u0648 \u0641\u0646\u0627\u0648\u0631\u06cc\u200c\u0647\u0627\u06cc \u0622\u06cc\u0646\u062f\u0647 \u0645\u0631\u062a\u0628\u0637 \u0628\u0627 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTEs)<\/h2>\n<p>\u067e\u06cc\u0634\u0631\u0641\u062a \u0647\u0627\u06cc \u0622\u06cc\u0646\u062f\u0647 \u062f\u0631 CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0634\u0627\u0645\u0644 \u0645\u0648\u0627\u0631\u062f \u0632\u06cc\u0631 \u0628\u0627\u0634\u062f:<\/p>\n<ul>\n<li><strong>\u062a\u06a9\u0646\u06cc\u06a9 \u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc:<\/strong> \u0627\u0644\u06af\u0648\u0631\u06cc\u062a\u0645 \u0647\u0627\u06cc \u0628\u0647\u0628\u0648\u062f \u06cc\u0627\u0641\u062a\u0647 \u0628\u0631\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a \u06a9\u0627\u0631\u0622\u0645\u062f.<\/li>\n<li><strong>\u0627\u062f\u063a\u0627\u0645 \u0628\u0627 \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0628\u0632\u0631\u06af:<\/strong> \u0641\u0639\u0627\u0644 \u06a9\u0631\u062f\u0646 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0628\u0631 \u0631\u0648\u06cc \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u062a\u0648\u0632\u06cc\u0639 \u0634\u062f\u0647.<\/li>\n<li><strong>\u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u067e\u06cc\u0634\u0631\u0641\u062a\u0647:<\/strong> \u067e\u06cc\u0634\u0631\u0641\u062a \u062f\u0631 \u062a\u0648\u0627\u0628\u0639 \u0622\u0645\u0627\u0631\u06cc \u0648 \u062a\u062d\u0644\u06cc\u0644\u06cc \u062f\u0631 CTE\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc.<\/li>\n<\/ul>\n<h2>\u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0627\u0632 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0627\u06a9\u0633\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f \u06cc\u0627 \u0628\u0627 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc (CTE) \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f<\/h2>\n<p>\u062f\u0631 \u0632\u0645\u06cc\u0646\u0647 \u06cc\u06a9 \u0627\u0631\u0627\u0626\u0647 \u062f\u0647\u0646\u062f\u0647 \u0633\u0631\u0648\u0631 \u067e\u0631\u0627\u06a9\u0633\u06cc \u0645\u0627\u0646\u0646\u062f OneProxy\u060c CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0631\u0627\u06cc \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u0648 \u0633\u0627\u0632\u0645\u0627\u0646\u062f\u0647\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u0634\u0628\u06a9\u0647\u060c \u0645\u0633\u06cc\u0631\u0647\u0627\u06cc \u0645\u0633\u06cc\u0631\u06cc\u0627\u0628\u06cc \u0648 \u0627\u062a\u0635\u0627\u0644 \u06a9\u0627\u0631\u0628\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u0648\u0646\u062f. \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u062f\u0631\u06a9 \u0631\u0641\u062a\u0627\u0631 \u0634\u0628\u06a9\u0647\u060c \u0645\u062f\u06cc\u0631\u06cc\u062a \u062a\u0648\u0632\u06cc\u0639 \u0628\u0627\u0631 \u0648 \u0628\u0647\u0628\u0648\u062f \u0627\u0642\u062f\u0627\u0645\u0627\u062a \u0627\u0645\u0646\u06cc\u062a\u06cc \u06a9\u0645\u06a9 \u06a9\u0646\u062f.<\/p>\n<h2>\u0644\u06cc\u0646\u06a9 \u0647\u0627\u06cc \u0645\u0631\u0628\u0648\u0637\u0647<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.postgresql.org\/docs\/current\/queries-with.html\" target=\"_new\" rel=\"noopener nofollow\">\u0627\u0633\u0646\u0627\u062f PostgreSQL \u062f\u0631 CTE\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc<\/a><\/li>\n<li><a href=\"https:\/\/docs.microsoft.com\/en-us\/sql\/t-sql\/queries\/with-common-table-expression-transact-sql\" target=\"_new\" rel=\"noopener nofollow\">CTE\u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u0645\u0627\u06cc\u06a9\u0631\u0648\u0633\u0627\u0641\u062a SQL Server<\/a><\/li>\n<li><a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/19\/sqlrf\/Hierarchical-Queries.html\" target=\"_new\" rel=\"noopener nofollow\">\u0631\u0627\u0647\u0646\u0645\u0627\u06cc Oracle \u0628\u0631\u0627\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0633\u0644\u0633\u0644\u0647 \u0645\u0631\u0627\u062a\u0628\u06cc \u0648 CTE \u0647\u0627\u06cc \u0628\u0627\u0632\u06af\u0634\u062a\u06cc<\/a><\/li>\n<\/ul>\n<p>\u0627\u06cc\u0646 \u067e\u06cc\u0648\u0646\u062f\u0647\u0627 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u062c\u0627\u0645\u0639\u060c \u0645\u062b\u0627\u0644\u200c\u0647\u0627 \u0648 \u0628\u0647\u062a\u0631\u06cc\u0646 \u0631\u0648\u0634\u200c\u0647\u0627 \u0631\u0627 \u0628\u0631\u0627\u06cc \u06a9\u0627\u0631 \u0628\u0627 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0627\u0632\u06af\u0634\u062a\u06cc \u062f\u0631 \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f.<\/p>","protected":false},"featured_media":469335,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478659","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Recursive Common Table Expressions (CTEs)<\/mark>","faq_items":[{"question":"What are Recursive Common Table Expressions (CTEs)?","answer":"<p>Recursive Common Table Expressions (CTEs) are temporary result sets in SQL that allow for complex hierarchical queries. They consist of two main parts: an anchor member that forms the base result set, and a recursive member that extends the result set by referring to the CTE itself.<\/p>"},{"question":"How were Recursive Common Table Expressions (CTEs) introduced?","answer":"<p>Recursive CTEs were introduced as part of the SQL:1999 standard and have since become widely supported by major database systems like PostgreSQL, Microsoft SQL Server, and Oracle.<\/p>"},{"question":"What is the internal structure of Recursive Common Table Expressions (CTEs)?","answer":"<p>The internal structure of a recursive CTE includes an initialization step where the anchor member is executed, followed by a recursion step where the recursive member repeatedly refers to the CTE's current result set, and a termination step when no additional rows are produced.<\/p>"},{"question":"What are the key features of Recursive Common Table Expressions (CTEs)?","answer":"<p>The key features of Recursive CTEs include enhanced code readability, maintainability, and flexibility in performing recursive queries without using temporary tables or cursors.<\/p>"},{"question":"Are there different types of Recursive Common Table Expressions (CTEs)?","answer":"<p>Yes, Recursive CTEs are composed of anchor members, which can be non-recursive terms or UNION statements, and recursive members that self-reference the CTE. They support various recursive algorithms like tree traversals and graph algorithms.<\/p>"},{"question":"What are some common ways to use Recursive CTEs, and what problems might be encountered?","answer":"<p>Recursive CTEs are commonly used for hierarchical data queries, path analysis, and data transformation. Problems that may arise include infinite loops and performance issues, which can be addressed with proper termination checks and query optimization.<\/p>"},{"question":"How do Recursive Common Table Expressions (CTEs) compare to similar terms like Temporary Tables and Cursors?","answer":"<p>Recursive CTEs offer better readability, often better performance, and excellent usability in hierarchies compared to Temporary Tables and Cursors.<\/p>"},{"question":"What are the future perspectives related to Recursive Common Table Expressions (CTEs)?","answer":"<p>Future advancements in recursive CTEs may include optimization techniques, integration with big data tools, and enhancements in statistical and analytical functions.<\/p>"},{"question":"How can Recursive Common Table Expressions (CTEs) be associated with proxy servers like OneProxy?","answer":"<p>Recursive CTEs can be used with proxy servers like OneProxy to analyze and organize hierarchical data related to network structures, routing paths, and user connectivity. This analysis can aid in understanding network behavior and improving security measures.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/wiki\/478659","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\/478659\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/media\/469335"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/media?parent=478659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}