{"id":476177,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:10","modified_gmt":"2023-09-05T11:12:10","slug":"cardinality","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/ir\/wiki\/cardinality\/","title":{"rendered":"\u0642\u062f\u0631\u062a\u0645\u0646\u062f\u06cc"},"content":{"rendered":"<p>Cardinality\u060c \u062f\u0631 \u0632\u0645\u06cc\u0646\u0647 \u067e\u0627\u06cc\u06af\u0627\u0647 \u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0648 \u0645\u062f\u06cc\u0631\u06cc\u062a \u062f\u0627\u062f\u0647\u060c \u0628\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0645\u0648\u062c\u0648\u062f \u062f\u0631 \u06cc\u06a9 \u0645\u062c\u0645\u0648\u0639\u0647 \u062f\u0627\u062f\u0647 \u06cc\u0627 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u062e\u0627\u0635 \u0627\u0632 \u062c\u062f\u0648\u0644 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0627\u0634\u0627\u0631\u0647 \u062f\u0627\u0631\u062f. \u0646\u0642\u0634 \u0645\u0647\u0645\u06cc \u062f\u0631 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647\u060c \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0648 \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u062f\u0627\u0631\u062f. \u062f\u0631\u06a9 \u0627\u0635\u0644\u06cc \u0628\u0648\u062f\u0646 \u06cc\u06a9 \u0645\u062c\u0645\u0648\u0639\u0647 \u062f\u0627\u062f\u0647 \u0628\u0631\u0627\u06cc \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0648 \u067e\u0631\u062f\u0627\u0632\u0634 \u06a9\u0627\u0631\u0622\u0645\u062f \u062f\u0627\u062f\u0647 \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a.<\/p>\n<h2>\u062a\u0627\u0631\u06cc\u062e\u0686\u0647 \u067e\u06cc\u062f\u0627\u06cc\u0634 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0648 \u0627\u0648\u0644\u06cc\u0646 \u0630\u06a9\u0631 \u0622\u0646<\/h2>\n<p>\u0645\u0641\u0647\u0648\u0645 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0631\u06cc\u0634\u0647 \u062f\u0631 \u0646\u0638\u0631\u06cc\u0647 \u0645\u062c\u0645\u0648\u0639\u0647 \u0647\u0627 \u0648 \u0631\u06cc\u0627\u0636\u06cc\u0627\u062a \u062f\u0627\u0631\u062f. \u0627\u0635\u0637\u0644\u0627\u062d &quot;\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647&quot; 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Cardinality \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0647\u0645\u0631\u0627\u0647 \u0628\u0627 \u0634\u0627\u062e\u0635 \u0647\u0627\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0631\u0627\u06cc \u0633\u0631\u0639\u062a \u0628\u062e\u0634\u06cc\u062f\u0646 \u0628\u0647 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<p>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0628\u0647 \u0633\u0647 \u0646\u0648\u0639 \u0637\u0628\u0642\u0647 \u0628\u0646\u062f\u06cc \u0645\u06cc \u0634\u0648\u062f:<\/p>\n<ol>\n<li>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u06a9\u0645: \u0633\u062a\u0648\u0646\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u06a9\u0645 \u062a\u0639\u062f\u0627\u062f \u06a9\u0645\u06cc \u0627\u0632 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\u0627\u06cc\u062f\u0647\u200c\u0622\u0644\u06cc \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647\u200c\u0633\u0627\u0632\u06cc \u0646\u0628\u0627\u0634\u0646\u062f\u060c \u0632\u06cc\u0631\u0627 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0632\u0645\u0627\u0646 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0628\u0647 \u0645\u06cc\u0632\u0627\u0646 \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647\u06cc \u06a9\u0627\u0647\u0634 \u0646\u062f\u0647\u0646\u062f.<\/li>\n<li>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0645\u062a\u0648\u0633\u0637: \u0633\u062a\u0648\u0646\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0645\u062a\u0648\u0633\u0637 \u062f\u0627\u0631\u0627\u06cc \u062a\u0639\u062f\u0627\u062f \u0645\u062a\u0648\u0633\u0637\u06cc \u0627\u0632 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632 \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0633\u062a\u0648\u0646\u200c\u0647\u0627 \u0628\u06cc\u0646 \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u06a9\u0645 \u0648 \u0632\u06cc\u0627\u062f \u062a\u0639\u0627\u062f\u0644 \u0628\u0631\u0642\u0631\u0627\u0631 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f \u0648 \u062f\u0631 \u0633\u0646\u0627\u0631\u06cc\u0648\u0647\u0627\u06cc \u062e\u0627\u0635\u06cc \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647\u200c\u0633\u0627\u0632\u06cc \u062f\u0631 \u0646\u0638\u0631 \u06af\u0631\u0641\u062a\u0647 \u0634\u0648\u0646\u062f.<\/li>\n<li>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627: \u0633\u062a\u0648\u0646\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627 \u062f\u0627\u0631\u0627\u06cc \u062a\u0639\u062f\u0627\u062f \u0632\u06cc\u0627\u062f\u06cc \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0646\u0633\u0628\u062a \u0628\u0647 \u062a\u0639\u062f\u0627\u062f \u0631\u062f\u06cc\u0641 \u0647\u0627\u06cc \u062c\u062f\u0648\u0644 \u0627\u0633\u062a. \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0647 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u0627\u0635\u0644\u06cc\u060c \u0622\u062f\u0631\u0633 \u0627\u06cc\u0645\u06cc\u0644 \u06cc\u0627 \u0646\u0627\u0645 \u06a9\u0627\u0631\u0628\u0631\u06cc \u0627\u0634\u0627\u0631\u0647 \u06a9\u0631\u062f. \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627 \u06a9\u0627\u0646\u062f\u06cc\u062f\u0627\u06cc \u0639\u0627\u0644\u06cc \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647\u200c\u0633\u0627\u0632\u06cc \u0647\u0633\u062a\u0646\u062f \u0632\u06cc\u0631\u0627 \u0645\u0646\u062c\u0631 \u0628\u0647 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f.<\/li>\n<\/ol>\n<h2>\u0633\u0627\u062e\u062a\u0627\u0631 \u062f\u0631\u0648\u0646\u06cc Cardinality. Cardinality \u0686\u06af\u0648\u0646\u0647 \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f<\/h2>\n<p>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627 \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u062f\u0631 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u062e\u0627\u0635 \u0627\u0632 \u062c\u062f\u0648\u0644 \u062a\u0639\u06cc\u06cc\u0646 \u0645\u06cc \u0634\u0648\u062f. \u0627\u06cc\u0646 \u0641\u0631\u0622\u06cc\u0646\u062f \u0634\u0627\u0645\u0644 \u0627\u0633\u06a9\u0646 \u0633\u062a\u0648\u0646 \u0648 \u0634\u0645\u0627\u0631\u0634 \u062a\u0639\u062f\u0627\u062f \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632 \u0645\u0648\u062c\u0648\u062f \u0627\u0633\u062a. \u0647\u0631 \u0686\u0647 \u062a\u0639\u062f\u0627\u062f \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0628\u06cc\u0634\u062a\u0631 \u0628\u0627\u0634\u062f\u060c \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0633\u062a\u0648\u0646 \u0628\u0627\u0644\u0627\u062a\u0631 \u0627\u0633\u062a.<\/p>\n<p>\u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 (DBMS) \u0628\u0631\u0627\u06cc \u06a9\u0645\u06a9 \u0628\u0647 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648\u060c \u0622\u0645\u0627\u0631\u06cc \u0631\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0645\u06cc \u06a9\u0646\u0646\u062f. \u0627\u06cc\u0646 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u062a\u0648\u0633\u0637 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0628\u0631\u0627\u06cc \u062a\u0635\u0645\u06cc\u0645\u200c\u06af\u06cc\u0631\u06cc \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631\u06cc\u0646 \u0637\u0631\u062d \u0627\u062c\u0631\u0627\u06cc \u06cc\u06a9 \u067e\u0631\u0633\u200c\u0648\u062c\u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f\u060c \u06a9\u0647 \u0627\u063a\u0644\u0628 \u0634\u0627\u0645\u0644 \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u0627\u062e\u0635 \u0648 \u0627\u0633\u062a\u0631\u0627\u062a\u0698\u06cc\u200c\u0647\u0627\u06cc \u067e\u06cc\u0648\u0633\u062a\u0646 \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 Cardinality<\/h2>\n<p>\u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f\u06cc \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u06cc \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632:<\/p>\n<ul>\n<li>\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648: Cardinality \u0646\u0642\u0634 \u0645\u0647\u0645\u06cc \u062f\u0631 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0627\u06cc\u0641\u0627 \u0645\u06cc \u06a9\u0646\u062f. \u0628\u0627 \u062f\u0627\u0646\u0633\u062a\u0646 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u060c \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0645\u0646\u0627\u0633\u0628\u200c\u062a\u0631\u06cc\u0646 \u0634\u0627\u062e\u0635 \u0631\u0627 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0646\u062f \u0648 \u0628\u0647 \u0627\u0633\u062a\u0631\u0627\u062a\u0698\u06cc\u200c\u0647\u0627 \u0628\u067e\u06cc\u0648\u0646\u062f\u062f \u062a\u0627 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u062f.<\/li>\n<li>\u062a\u0648\u0632\u06cc\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627: Cardinality \u0628\u06cc\u0646\u0634 \u0647\u0627\u06cc\u06cc \u0631\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u062a\u0648\u0632\u06cc\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f. \u062f\u0631\u06a9 \u062a\u0648\u0632\u06cc\u0639 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062f\u0631 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0628\u0631\u0627\u06cc \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0648 \u062a\u0635\u0645\u06cc\u0645 \u06af\u06cc\u0631\u06cc \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a.<\/li>\n<li>\u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc: Cardinality \u0628\u0647 \u062a\u0639\u06cc\u06cc\u0646 \u0627\u06cc\u0646\u06a9\u0647 \u06a9\u062f\u0627\u0645 \u0633\u062a\u0648\u0646 \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0645\u0646\u0627\u0633\u0628 \u0627\u0633\u062a \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f. \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u06a9\u0627\u0646\u062f\u06cc\u062f\u0647\u0627\u06cc \u0628\u0647\u062a\u0631\u06cc \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647\u200c\u0633\u0627\u0632\u06cc \u0647\u0633\u062a\u0646\u062f\u060c \u0632\u06cc\u0631\u0627 \u0645\u0646\u062c\u0631 \u0628\u0647 \u0646\u0645\u0627\u06cc\u0647\u200c\u0647\u0627\u06cc \u0627\u0646\u062a\u062e\u0627\u0628\u06cc\u200c\u062a\u0631 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f.<\/li>\n<\/ul>\n<h2>\u0627\u0646\u0648\u0627\u0639 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647<\/h2>\n<p>\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0642\u0628\u0644\u0627 \u0630\u06a9\u0631 \u0634\u062f\u060c \u0628\u0631 \u0627\u0633\u0627\u0633 \u062a\u0639\u062f\u0627\u062f \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632 \u062f\u0631 \u06cc\u06a9 \u0633\u062a\u0648\u0646\u060c \u0633\u0647 \u0646\u0648\u0639 \u0627\u0635\u0644\u06cc \u0627\u0632 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f. \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0646\u0645\u0627\u06cc \u062e\u0644\u0627\u0635\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0646\u0648\u0639 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u06cc<\/th>\n<th>\u0634\u0631\u062d<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u06a9\u0645<\/td>\n<td>\u062a\u0639\u062f\u0627\u062f \u06a9\u0645\u06cc \u0627\u0632 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632 \u062f\u0631 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0628\u0627 \u062a\u0639\u062f\u0627\u062f \u06a9\u0644 \u0631\u062f\u06cc\u0641\u200c\u0647\u0627. \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0627\u06cc\u062f\u0647 \u0622\u0644 \u0646\u06cc\u0633\u062a.<\/td>\n<\/tr>\n<tr>\n<td>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0645\u062a\u0648\u0633\u0637<\/td>\n<td>\u062a\u0639\u062f\u0627\u062f \u0645\u062a\u0648\u0633\u0637\u06cc \u0627\u0632 \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632. \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u062f\u0631 \u0633\u0646\u0627\u0631\u06cc\u0648\u0647\u0627\u06cc \u062e\u0627\u0635 \u062f\u0631 \u0646\u0638\u0631 \u06af\u0631\u0641\u062a\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/td>\n<\/tr>\n<tr>\n<td>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627<\/td>\n<td>\u062a\u0639\u062f\u0627\u062f \u0632\u06cc\u0627\u062f\u06cc \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0646\u0633\u0628\u062a \u0628\u0647 \u062a\u0639\u062f\u0627\u062f \u0631\u062f\u06cc\u0641 \u0647\u0627. \u0646\u0627\u0645\u0632\u062f\u0647\u0627\u06cc \u0639\u0627\u0644\u06cc \u0628\u0631\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0631\u0627\u0647 \u0647\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Cardinality\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>\u0631\u0648\u0634 \u0647\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Cardinality:<\/h3>\n<ol>\n<li>\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648: \u0627\u0637\u0644\u0627\u0639\u0627\u062a Cardinality \u0628\u0631\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a. \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0645\u0646\u0627\u0633\u0628 \u0633\u062a\u0648\u0646 \u0647\u0627\u06cc \u0628\u0627 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647\u06cc \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u062f.<\/li>\n<li>\u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627: \u062f\u0631\u06a9 \u062a\u0648\u0632\u06cc\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0647 \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0648 \u062a\u0635\u0645\u06cc\u0645 \u06af\u06cc\u0631\u06cc \u0645\u0639\u0646\u0627\u062f\u0627\u0631 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f.<\/li>\n<\/ol>\n<h3>\u0645\u0634\u06a9\u0644\u0627\u062a \u0648 \u0631\u0627\u0647 \u062d\u0644 \u0647\u0627:<\/h3>\n<ol>\n<li>\u0622\u0645\u0627\u0631 \u0645\u0646\u0633\u0648\u062e \u0634\u062f\u0647: \u0622\u0645\u0627\u0631 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0642\u062f\u06cc\u0645\u06cc \u06cc\u0627 \u0646\u0627\u062f\u0631\u0633\u062a \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0637\u0631\u062d \u0647\u0627\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648\u06cc \u0646\u0627\u0645\u0637\u0644\u0648\u0628 \u0634\u0648\u062f. \u0628\u0647 \u0631\u0648\u0632 \u0631\u0633\u0627\u0646\u06cc \u0645\u0646\u0638\u0645 \u0622\u0645\u0627\u0631 \u0628\u0631\u0627\u06cc \u062d\u0641\u0638 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a.<\/li>\n<li>\u062a\u0648\u0632\u06cc\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u06a9\u062c: \u062a\u0648\u0632\u06cc\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u06a9\u062c \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0627\u0639\u062b \u0627\u06cc\u062c\u0627\u062f \u0634\u0627\u062e\u0635 \u0647\u0627\u06cc \u0646\u0627\u0645\u062a\u0639\u0627\u062f\u0644 \u0634\u0648\u062f \u0648 \u062f\u0631 \u0646\u062a\u06cc\u062c\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0636\u0639\u06cc\u0641 \u0628\u0627\u0634\u062f. \u062a\u0642\u0633\u06cc\u0645 \u0628\u0646\u062f\u06cc \u06cc\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0645\u0627\u0631\u0647\u0627\u06cc \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0647\u06cc\u0633\u062a\u0648\u06af\u0631\u0627\u0645 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u06a9\u0627\u0647\u0634 \u0627\u06cc\u0646 \u0645\u0634\u06a9\u0644 \u06a9\u0645\u06a9 \u06a9\u0646\u062f.<\/li>\n<\/ol>\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<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0645\u0634\u062e\u0635\u0647<\/th>\n<th>\u0642\u062f\u0631\u062a\u0645\u0646\u062f\u06cc<\/th>\n<th>\u062a\u0631\u0627\u06a9\u0645<\/th>\n<th>\u06af\u0632\u06cc\u0646\u0634 \u067e\u0630\u06cc\u0631\u06cc<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u062a\u0639\u0631\u06cc\u0641<\/td>\n<td>\u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u062f\u0631 \u06cc\u06a9 \u0633\u062a\u0648\u0646<\/td>\n<td>\u0646\u0633\u0628\u062a \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632 \u0628\u0647 \u06a9\u0644 \u0631\u062f\u06cc\u0641 \u0647\u0627\u06cc \u06cc\u06a9 \u0633\u062a\u0648\u0646<\/td>\n<td>\u0627\u0646\u062f\u0627\u0632\u0647 \u06af\u06cc\u0631\u06cc \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f \u0628\u0648\u062f\u0646 \u06cc\u06a9 \u0633\u062a\u0648\u0646<\/td>\n<\/tr>\n<tr>\n<td>\u062a\u0627\u062b\u06cc\u0631 \u0628\u0631 \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc<\/td>\n<td>\u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0627\u0644\u0627 \u0645\u0646\u062c\u0631 \u0628\u0647 \u0634\u0627\u062e\u0635 \u0647\u0627\u06cc \u0627\u0646\u062a\u062e\u0627\u0628\u06cc \u0628\u06cc\u0634\u062a\u0631 \u0645\u06cc \u0634\u0648\u062f<\/td>\n<td>\u0686\u06af\u0627\u0644\u06cc \u0628\u0627\u0644\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0630\u062e\u06cc\u0631\u0647 \u0633\u0627\u0632\u06cc \u0641\u0634\u0631\u062f\u0647 \u062a\u0631 \u0634\u0648\u062f<\/td>\n<td>\u06af\u0632\u06cc\u0646\u0634 \u067e\u0630\u06cc\u0631\u06cc \u0628\u0627\u0644\u0627 \u0628\u0647 \u0645\u0639\u0646\u0627\u06cc \u0633\u062a\u0648\u0646 \u0645\u0646\u062d\u0635\u0631 \u0628\u0647 \u0641\u0631\u062f\u062a\u0631\u06cc \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \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\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u06cc<\/h2>\n<p>\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0647\u0645\u0686\u0646\u0627\u0646 \u062f\u0631 \u062d\u062c\u0645 \u0648 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0631\u0634\u062f \u0645\u06cc \u06a9\u0646\u0646\u062f\u060c \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u06cc\u06a9 \u0645\u0641\u0647\u0648\u0645 \u0627\u0633\u0627\u0633\u06cc \u062f\u0631 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0648 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0627\u0642\u06cc \u062e\u0648\u0627\u0647\u062f \u0645\u0627\u0646\u062f. \u0641\u0646\u0627\u0648\u0631\u06cc\u200c\u0647\u0627\u06cc \u0622\u06cc\u0646\u062f\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0631 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0622\u0645\u0627\u0631\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647\u200c\u062a\u0631 \u0628\u0631\u0627\u06cc \u062a\u062e\u0645\u06cc\u0646 \u062f\u0642\u06cc\u0642 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647\u060c \u0628\u0647\u200c\u0648\u06cc\u0698\u0647 \u062f\u0631 \u0645\u062d\u06cc\u0637\u200c\u0647\u0627\u06cc \u062a\u0648\u0632\u06cc\u0639\u200c\u0634\u062f\u0647 \u0648 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u062a\u0645\u0631\u06a9\u0632 \u06a9\u0646\u0646\u062f.<\/p>\n<p>\u0628\u0627 \u067e\u06cc\u0634\u0631\u0641\u062a\u200c\u0647\u0627\u06cc \u0645\u062f\u0627\u0648\u0645 \u062f\u0631 \u0647\u0648\u0634 \u0645\u0635\u0646\u0648\u0639\u06cc \u0648 \u06cc\u0627\u062f\u06af\u06cc\u0631\u06cc \u0645\u0627\u0634\u06cc\u0646\u06cc\u060c \u062a\u062e\u0645\u06cc\u0646 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u067e\u06cc\u0634\u200c\u0628\u06cc\u0646\u06cc \u0628\u0631\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633\u200c\u0648\u062c\u0648 \u0628\u0647 \u0637\u0648\u0631 \u062e\u0648\u062f\u06a9\u0627\u0631 \u0628\u0647\u0631\u0647\u200c\u0645\u0646\u062f \u0634\u0648\u062f. \u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u06cc\u0646\u060c \u0631\u0648\u06cc\u06a9\u0631\u062f\u0647\u0627\u06cc \u062c\u062f\u06cc\u062f \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0628\u0631\u0627\u06cc \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0646\u06cc\u0645\u0647 \u0633\u0627\u062e\u062a\u0627\u0631\u06cc\u0627\u0641\u062a\u0647 \u0648 \u0628\u062f\u0648\u0646 \u0633\u0627\u062e\u062a\u0627\u0631 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0631\u0627\u06cc \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0627\u0632 \u0642\u0627\u0644\u0628\u200c\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0645\u062f\u0631\u0646 \u0648 \u0645\u0646\u0627\u0628\u0639 \u062f\u0627\u062f\u0647 \u0645\u062a\u0646\u0648\u0639 \u067e\u062f\u06cc\u062f\u0627\u0631 \u0634\u0648\u062f.<\/p>\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 Cardinality \u0645\u0631\u062a\u0628\u0637 \u0634\u062f<\/h2>\n<p>\u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u0646\u0642\u0634 \u0645\u0647\u0645\u06cc \u062f\u0631 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u0648 \u0627\u0645\u0646\u06cc\u062a \u0628\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0627\u0632 \u062c\u0645\u0644\u0647 \u062d\u0630\u0641 \u0648\u0628\u060c \u062c\u0645\u0639 \u0622\u0648\u0631\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627 \u0648 \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0645\u062d\u062a\u0648\u0627 \u062f\u0627\u0631\u0646\u062f. \u0647\u0646\u06af\u0627\u0645 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc\u060c \u062f\u0631\u06a9 \u0627\u0635\u0644\u06cc \u0628\u0648\u062f\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0634\u062f\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0627\u0632 \u0686\u0646\u062f \u062c\u0647\u062a \u0645\u0641\u06cc\u062f \u0628\u0627\u0634\u062f:<\/p>\n<ol>\n<li>\u0645\u0633\u06cc\u0631\u06cc\u0627\u0628\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648: \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627 \u0631\u0627 \u0628\u0647 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u062e\u0627\u0635 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0627\u0635\u0644\u06cc \u0628\u0648\u062f\u0646 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0628\u0631\u0627\u06cc \u0645\u062a\u0639\u0627\u062f\u0644 \u06a9\u0631\u062f\u0646 \u0628\u0627\u0631 \u0648 \u0628\u0647\u0628\u0648\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u0647\u062f\u0627\u06cc\u062a \u06a9\u0646\u0646\u062f.<\/li>\n<li>\u0645\u062f\u06cc\u0631\u06cc\u062a \u062d\u0627\u0641\u0638\u0647 \u067e\u0646\u0647\u0627\u0646: \u0627\u0637\u0644\u0627\u0639\u0627\u062a Cardinality \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0631\u0627\u06cc \u062a\u0639\u06cc\u06cc\u0646 \u0627\u06cc\u0646\u06a9\u0647 \u06a9\u062f\u0627\u0645 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0628\u0627\u06cc\u062f \u062f\u0631 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0627\u06a9\u0633\u06cc \u0630\u062e\u06cc\u0631\u0647 \u0634\u0648\u0646\u062f \u0648 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0647\u0627\u06cc \u0622\u06cc\u0646\u062f\u0647 \u0631\u0627 \u0628\u0647\u06cc\u0646\u0647 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f.<\/li>\n<\/ol>\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 Cardinality \u0648 \u0646\u0642\u0634 \u0622\u0646 \u062f\u0631 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0648 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647\u060c \u0628\u0647 \u0645\u0646\u0627\u0628\u0639 \u0632\u06cc\u0631 \u0645\u0631\u0627\u062c\u0639\u0647 \u06a9\u0646\u06cc\u062f:<\/p>\n<ol>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Cardinality_(data_modeling)\" target=\"_new\" rel=\"noopener nofollow\">\u0648\u06cc\u06a9\u06cc\u200c\u067e\u062f\u06cc\u0627 \u2013 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u06cc (\u0645\u062f\u0644\u200c\u0633\u0627\u0632\u06cc \u062f\u0627\u062f\u0647\u200c\u0647\u0627)<\/a><\/li>\n<li><a href=\"https:\/\/docs.microsoft.com\/en-us\/sql\/relational-databases\/statistics\/cardinality-estimation-database-engine?view=sql-server-ver15\" target=\"_new\" rel=\"noopener nofollow\">Microsoft Docs - \u0628\u0631\u0622\u0648\u0631\u062f \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u06cc<\/a><\/li>\n<li><a href=\"https:\/\/docs.oracle.com\/database\/121\/TGSQL\/tgsql_statisticsconcepts.htm#TGSQL888\" target=\"_new\" rel=\"noopener nofollow\">Oracle - \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0648 \u0627\u0646\u062a\u062e\u0627\u0628 \u067e\u0630\u06cc\u0631\u06cc<\/a><\/li>\n<\/ol>\n<p>\u062f\u0631 \u0646\u062a\u06cc\u062c\u0647\u060c Cardinality \u0646\u0642\u0634 \u0627\u0633\u0627\u0633\u06cc \u062f\u0631 \u0645\u062f\u06cc\u0631\u06cc\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647\u060c \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0648 \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u062f\u0627\u0631\u062f. \u062f\u0631\u06a9 \u0627\u0635\u0644\u06cc \u0628\u0648\u062f\u0646 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0628\u0631\u0627\u06cc \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u06a9\u0627\u0631\u0622\u0645\u062f \u062f\u0627\u062f\u0647 \u0647\u0627\u060c \u0630\u062e\u06cc\u0631\u0647 \u0633\u0627\u0632\u06cc \u0648 \u0639\u0645\u0644\u06a9\u0631\u062f \u06a9\u0644\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a. \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0628\u0647 \u062a\u06a9\u0627\u0645\u0644 \u062e\u0648\u062f \u0627\u062f\u0627\u0645\u0647 \u0645\u06cc \u062f\u0647\u0646\u062f\u060c \u067e\u06cc\u0634\u0631\u0641\u062a \u062f\u0631 \u0641\u0646 \u0622\u0648\u0631\u06cc \u0648 \u0631\u0648\u0634 \u0647\u0627\u06cc \u0622\u0645\u0627\u0631\u06cc \u0627\u062d\u062a\u0645\u0627\u0644\u0627\u064b \u0628\u0647 \u0628\u0631\u0622\u0648\u0631\u062f \u062f\u0642\u06cc\u0642 \u062a\u0631 \u06a9\u0627\u0631\u062f\u06cc\u0646\u0627\u0644\u06cc\u062a\u0647 \u0648 \u062a\u06a9\u0646\u06cc\u06a9 \u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f. \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0641\u0647\u0648\u0645 Cardinality \u0647\u0645\u0631\u0627\u0647 \u0628\u0627 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc\u060c \u06a9\u0633\u0628 \u0648 \u06a9\u0627\u0631\u0647\u0627 \u0648 \u0633\u0627\u0632\u0645\u0627\u0646 \u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0645\u062f\u06cc\u0631\u06cc\u062a \u062f\u0627\u062f\u0647\u060c \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u0648 \u0634\u06cc\u0648\u0647 \u0647\u0627\u06cc \u0627\u0645\u0646\u06cc\u062a\u06cc \u062e\u0648\u062f \u0631\u0627 \u0627\u0641\u0632\u0627\u06cc\u0634 \u062f\u0647\u0646\u062f.<\/p>","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476177","wiki","type-wiki","status-publish","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Cardinality: A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is Cardinality, and how does it relate to databases?","answer":"<p>Cardinality refers to the number of unique values present in a column of a database table. It is a crucial concept in database management as it helps optimize query performance, analyze data distribution, and identify suitable candidates for indexing. Understanding Cardinality enables efficient data retrieval and improves overall database performance.<\/p>"},{"question":"Who introduced the concept of Cardinality, and where did it originate?","answer":"<p>The concept of Cardinality was introduced by the German mathematician Georg Cantor in the 1870s. He used it in set theory to compare the sizes of different sets, even infinite ones. Over time, Cardinality found its application in various fields, including computer science and database management.<\/p>"},{"question":"What are the different types of Cardinality, and how are they categorized?","answer":"<p>Cardinality is categorized into three types based on the number of unique values in a column:<\/p><ol><li>Low Cardinality: A column with a small number of distinct values compared to the total number of rows.<\/li><li>Moderate Cardinality: A column with a moderate number of distinct values, striking a balance between low and high Cardinality.<\/li><li>High Cardinality: A column with a large number of unique values relative to the number of rows.<\/li><\/ol>"},{"question":"How does Cardinality impact query optimization and data analysis?","answer":"<p>Cardinality plays a vital role in query optimization. By understanding the distribution of data and the uniqueness of values, the query optimizer can choose the most suitable index and join strategies, leading to faster query execution times. Additionally, Cardinality provides insights into data distribution, which is essential for meaningful data analysis and decision-making.<\/p>"},{"question":"What are some common problems related to Cardinality, and how can they be addressed?","answer":"<p>Outdated or inaccurate Cardinality statistics can lead to suboptimal query plans. Regularly updating statistics is essential to maintain database performance. Skewed data distributions can also cause imbalanced indexes, resulting in poor query performance. Partitioning or using histogram-based statistics can help mitigate this issue.<\/p>"},{"question":"How does Cardinality differ from other similar terms like density and selectivity?","answer":"<p>Cardinality refers to the unique values in a column, while density is the ratio of distinct values to total rows in a column, and selectivity measures the uniqueness of a column for filtering. Each term serves different purposes in database management, and understanding their distinctions is crucial for efficient data handling.<\/p>"},{"question":"What are the future perspectives and technologies related to Cardinality?","answer":"<p>As data continues to grow in volume and complexity, Cardinality will remain essential in database management and optimization. Future technologies may focus on more advanced statistical methods for accurate Cardinality estimation, especially in distributed and big data environments. Predictive models and new approaches for handling semi-structured and unstructured data may also emerge.<\/p>"},{"question":"How can proxy servers be associated with Cardinality in data retrieval and security?","answer":"<p>Proxy servers can use Cardinality information to optimize query routing, balancing the load and enhancing performance. Additionally, Cardinality can help determine which data should be cached on proxy servers, improving future requests and contributing to enhanced data retrieval and security practices.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/wiki\/476177","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\/476177\/revisions"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/ir\/wp-json\/wp\/v2\/media?parent=476177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}