- \n
- \u06a9\u0627\u0647\u0634 \u0632\u0645\u0627\u0646 \u067e\u0627\u0633\u062e\u200c\u06af\u0648\u06cc\u06cc<\/strong>: \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0634\u062f\u0647 \u0628\u0647 \u0633\u0631\u0639\u062a \u0628\u0647 \u0646\u062a\u0627\u06cc\u062c\u060c \u062f\u0633\u062a\u0631\u0633\u06cc \u067e\u06cc\u062f\u0627 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f \u06a9\u0647 \u0627\u06cc\u0646 \u0645\u0648\u0636\u0648\u0639 \u0628\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0628\u0647 \u0632\u0645\u0627\u0646 \u067e\u0627\u0633\u062e \u0633\u0631\u06cc\u0639 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u0646\u062f \u0628\u0633\u06cc\u0627\u0631 \u062d\u06cc\u0627\u062a\u06cc \u0627\u0633\u062a.<\/li>\n\n\n\n
- \u06a9\u0627\u0647\u0634 \u0645\u0635\u0631\u0641 \u0645\u0646\u0627\u0628\u0639 \u0633\u06cc\u0633\u062a\u0645<\/strong>: \u0628\u0627 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0646\u0627\u0628\u0639\u06cc \u0645\u0627\u0646\u0646\u062f CPU\u060c \u062d\u0627\u0641\u0638\u0647 \u0648 I\/O \u0628\u0647 \u062d\u062f\u0627\u0642\u0644 \u0645\u06cc\u200c\u0631\u0633\u062f.<\/li>\n\n\n\n
- \u0627\u0641\u0632\u0627\u06cc\u0634 \u0645\u0642\u06cc\u0627\u0633\u200c\u067e\u0630\u06cc\u0631\u06cc<\/strong>: \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u062a\u0631 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u062d\u062c\u0645 \u0628\u06cc\u0634\u062a\u0631\u06cc \u0627\u0632 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0648 \u062a\u0639\u062f\u0627\u062f \u0628\u06cc\u0634\u062a\u0631\u06cc \u0627\u0632 \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0631\u0627 \u0645\u062f\u06cc\u0631\u06cc\u062a \u06a9\u0646\u0646\u062f.<\/li>\n\n\n\n
- \u06a9\u0627\u0647\u0634 \u0647\u0632\u06cc\u0646\u0647\u200c\u0647\u0627<\/strong>: \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0647\u0632\u06cc\u0646\u0647\u200c\u0647\u0627\u06cc \u0645\u0631\u062a\u0628\u0637 \u0628\u0627 \u0633\u062e\u062a\u200c\u0627\u0641\u0632\u0627\u0631 \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0631\u0627 \u06a9\u0627\u0647\u0634 \u062f\u0647\u062f.<\/li>\n<\/ul>\n\n\n\n
\u0627\u0635\u0648\u0644 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627<\/h2>\n\n\n\n
\u06f1. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627<\/strong><\/h3>\n\n\n\n
\u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627 (\u0634\u0627\u062e\u0635\u200c\u0647\u0627) \u06cc\u06a9\u06cc \u0627\u0632 \u0627\u0635\u0644\u06cc\u200c\u062a\u0631\u06cc\u0646 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627 \u0628\u0631\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0647\u0633\u062a\u0646\u062f. \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627\u060c \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0633\u0631\u0639\u062a \u0628\u0647 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc \u0645\u0648\u0631\u062f \u0646\u06cc\u0627\u0632 \u062f\u0633\u062a\u0631\u0633\u06cc \u067e\u06cc\u062f\u0627 \u06a9\u0646\u062f\u060c \u0628\u0647 \u062c\u0627\u06cc \u0627\u06cc\u0646\u06a9\u0647 \u0647\u0645\u0647 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627 \u0631\u0627 \u062c\u0633\u062a\u062c\u0648 \u06a9\u0646\u062f.<\/p>\n\n\n\n
- \n
- \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627\u06cc B-tree<\/strong>: \u0627\u06cc\u0646 \u0646\u0648\u0639 \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627 \u0628\u0631\u0627\u06cc \u062c\u0633\u062a\u062c\u0648\u0647\u0627\u06cc \u062a\u0631\u062a\u06cc\u0628\u06cc \u0648 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0627\u0632 \u0645\u0642\u0627\u06cc\u0633\u0647\u200c\u0647\u0627\u06cc \u0634\u0631\u0637\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f\u060c \u0628\u0633\u06cc\u0627\u0631 \u0645\u0646\u0627\u0633\u0628 \u0627\u0633\u062a.<\/li>\n\n\n\n
- \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627\u06cc Hash<\/strong>: \u0628\u0631\u0627\u06cc \u062c\u0633\u062a\u062c\u0648\u0647\u0627\u06cc \u062f\u0642\u06cc\u0642 \u0648 \u0645\u0637\u0627\u0628\u0642\u062a\u200c\u0647\u0627\u06cc \u0628\u0631\u0627\u0628\u0631 \u0633\u0631\u06cc\u0639\u200c\u062a\u0631\u06cc\u0646 \u06af\u0632\u06cc\u0646\u0647 \u0647\u0633\u062a\u0646\u062f.<\/li>\n<\/ul>\n\n\n
\n![\"\u062f\u06cc\u0627\u06af\u0631\u0627\u0645](\"https:\/\/hamravesh.com\/blog\/wp-content\/uploads\/2024\/11\/b-tree-index-1024x465.webp\")
\u0627\u06cc\u0646\u062f\u06a9\u0633 B-Tree<\/figcaption><\/figure>\n<\/div>\n\n\n \u06f2. \u0627\u062c\u062a\u0646\u0627\u0628 \u0627\u0632 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u063a\u06cc\u0631\u0636\u0631\u0648\u0631\u06cc \u0648 \u067e\u06cc\u0686\u06cc\u062f\u0647<\/strong><\/h3>\n\n\n\n
\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u0633\u0627\u062f\u0647 \u0648 \u0645\u062e\u062a\u0635\u0631 \u0647\u0645\u06cc\u0634\u0647 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0628\u0647\u062a\u0631\u06cc \u0646\u0633\u0628\u062a \u0628\u0647 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u062f\u0627\u0631\u062f. \u0627\u06af\u0631 \u06cc\u06a9 \u06a9\u0648\u0626\u0631\u06cc \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0627 \u062a\u0639\u062f\u0627\u062f \u06a9\u0645\u062a\u0631\u06cc \u0634\u0631\u0637 \u0646\u0648\u0634\u062a\u0647 \u0634\u0648\u062f\u060c \u0628\u0647\u062a\u0631 \u0627\u0633\u062a \u0622\u0646 \u0631\u0627 \u0633\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645.<\/p>\n\n\n\n
\u06f3. \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc JOIN\u0647\u0627<\/strong><\/h3>\n\n\n\n
JOIN\u0647\u0627 \u06cc\u06a9\u06cc \u0627\u0632 \u0639\u0648\u0627\u0645\u0644 \u0645\u0647\u0645 \u062f\u0631 \u06a9\u0627\u0647\u0634 \u0633\u0631\u0639\u062a \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0647\u0633\u062a\u0646\u062f. \u0628\u0631\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u0627\u06cc\u0646 \u0628\u062e\u0634:<\/p>\n\n\n\n
- \n
- \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 INNER JOIN \u0628\u0647 \u062c\u0627\u06cc OUTER JOIN<\/strong>: \u062f\u0631 \u0635\u0648\u0631\u062a\u06cc \u06a9\u0647 \u0647\u0645\u0647 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0645\u0648\u0631\u062f \u0646\u06cc\u0627\u0632 \u0646\u06cc\u0633\u062a\u0646\u062f\u060c INNER JOIN \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u0628\u0647\u062a\u0631\u06cc \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f.<\/li>\n\n\n\n
- \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u06af\u0630\u0627\u0631\u06cc \u0631\u0648\u06cc \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u067e\u06cc\u0648\u0633\u062a\u06cc (Join Keys)<\/strong>: \u0628\u0627 \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u06af\u0630\u0627\u0631\u06cc \u0631\u0648\u06cc \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u062f\u0631 JOIN\u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u06cc\u062f.<\/li>\n<\/ul>\n\n\n\n
\u06f4. \u06a9\u0627\u0647\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632
SELECT *<\/code><\/h3>\n\n\n\n\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632
SELECT *<\/code> \u0628\u0627\u0639\u062b \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u062a\u0645\u0627\u0645 \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc \u062c\u062f\u0648\u0644\u200c\u0647\u0627 \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u0648\u0646\u062f \u06a9\u0647 \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0646\u0647 \u062a\u0646\u0647\u0627 \u062d\u0627\u0641\u0638\u0647 \u0628\u06cc\u0634\u062a\u0631\u06cc \u0645\u0635\u0631\u0641 \u0645\u06cc\u200c\u06a9\u0646\u062f\u060c \u0628\u0644\u06a9\u0647 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc \u0631\u0627 \u0646\u06cc\u0632 \u0627\u0641\u0632\u0627\u06cc\u0634 \u0645\u06cc\u200c\u062f\u0647\u062f. \u0628\u0647\u062a\u0631 \u0627\u0633\u062a \u062a\u0646\u0647\u0627 \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc \u0645\u0648\u0631\u062f \u0646\u06cc\u0627\u0632 \u062f\u0631 \u06a9\u0648\u0626\u0631\u06cc \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u0648\u0646\u062f.<\/p>\n\n\n\n\u06f5. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 LIMIT \u0628\u0631\u0627\u06cc \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u0646\u062a\u0627\u06cc\u062c<\/strong><\/h3>\n\n\n\n
\u0627\u06af\u0631 \u0641\u0642\u0637 \u0628\u0647 \u062a\u0639\u062f\u0627\u062f \u0645\u062d\u062f\u0648\u062f\u06cc \u0627\u0632 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u062f\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0639\u0628\u0627\u0631\u062a
LIMIT<\/code> \u06cc\u0627 \u0645\u0639\u0627\u062f\u0644 \u0622\u0646 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc \u0648 \u0645\u0635\u0631\u0641 \u0645\u0646\u0627\u0628\u0639 \u0631\u0627 \u06a9\u0627\u0647\u0634 \u062f\u0647\u062f.<\/p>\n\n\n\n\u06f6. \u0622\u0646\u0627\u0644\u06cc\u0632 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Execution Plan<\/strong><\/h3>\n\n\n\n
\u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0645\u0627\u0646\u0646\u062f MySQL<\/a><\/strong> \u060cSQL Server \u0648 PostgreSQL \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0645\u0634\u0627\u0647\u062f\u0647 Execution Plan<\/a> \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f \u06a9\u0647 \u0646\u0634\u0627\u0646 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f \u0686\u06af\u0648\u0646\u0647 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f. \u0628\u0627 \u062a\u062d\u0644\u06cc\u0644 \u0627\u06cc\u0646 \u067e\u0644\u0627\u0646\u200c\u0647\u0627\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0647 \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u06af\u0644\u0648\u06af\u0627\u0647\u200c\u0647\u0627\u06cc \u0645\u0648\u062c\u0648\u062f \u062f\u0631 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0628\u067e\u0631\u062f\u0627\u0632\u06cc\u062f.<\/p>\n\n\n\n
\u06f7. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0634\u0631\u0637\u200c\u0647\u0627\u06cc WHERE \u0628\u0631\u0627\u06cc \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627<\/strong><\/h3>\n\n\n\n
\u0627\u0636\u0627\u0641\u0647 \u06a9\u0631\u062f\u0646 \u0634\u0631\u0637\u200c\u0647\u0627\u06cc \u0645\u0646\u0627\u0633\u0628 \u062f\u0631 \u0628\u062e\u0634
WHERE<\/code> \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0637\u0648\u0631 \u0686\u0634\u0645\u06af\u06cc\u0631\u06cc \u062d\u062c\u0645 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u0628\u0627\u06cc\u062f \u067e\u0631\u062f\u0627\u0632\u0634 \u06a9\u0646\u062f \u0631\u0627 \u06a9\u0627\u0647\u0634 \u062f\u0647\u062f. \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0628\u0647 \u0648\u06cc\u0698\u0647 \u062f\u0631 \u0645\u0648\u0631\u062f \u062c\u062f\u0627\u0648\u0644 \u0628\u0632\u0631\u06af \u0648 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0634\u0627\u0645\u0644 JOIN\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0647\u0633\u062a\u0646\u062f\u060c \u0628\u0633\u06cc\u0627\u0631 \u0645\u0641\u06cc\u062f \u0627\u0633\u062a.<\/p>\n\n\n\n\u0627\u0632 \u0634\u0631\u0637\u200c\u0647\u0627\u06cc \u0645\u062d\u062f\u0648\u062f\u06a9\u0646\u0646\u062f\u0647 \u0645\u0627\u0646\u0646\u062f
WHERE<\/code> \u0648HAVING<\/code> \u0628\u0647\u200c\u0637\u0648\u0631 \u0647\u0648\u0634\u0645\u0646\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f \u062a\u0627 \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u062a\u0646\u0647\u0627 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc\u06cc \u0631\u0627 \u06a9\u0647 \u0648\u0627\u0642\u0639\u0627\u064b \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u062f\u060c \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0646\u062f.<\/p>\n\n\n\n\u06f8. \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0648\u0627\u0628\u0639 \u062f\u0631 \u0634\u0631\u0637\u200c\u0647\u0627\u06cc WHERE<\/strong><\/h3>\n\n\n\n
\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0648\u0627\u0628\u0639 \u062f\u0631 \u0628\u062e\u0634
WHERE<\/code> \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0627\u0639\u062b \u06a9\u0627\u0647\u0634 \u0639\u0645\u0644\u06a9\u0631\u062f \u0634\u0648\u062f\u060c \u0632\u06cc\u0631\u0627 \u0627\u062c\u0631\u0627\u06cc \u062a\u0648\u0627\u0628\u0639 \u0628\u0631\u0627\u06cc \u0647\u0631 \u0631\u06a9\u0648\u0631\u062f \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0627\u0639\u062b \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0628\u0647\u06cc\u0646\u0647 \u0627\u0632 \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627 \u0634\u0648\u062f.<\/p>\n\n\n\n\u0645\u062b\u0627\u0644 \u0636\u0639\u06cc\u0641<\/strong>:<\/p>\n\n\n\n
WHERE YEAR(date_column) = 2024<\/code><\/pre>\n\n\n\n\u0645\u062b\u0627\u0644 \u0628\u0647\u062a\u0631<\/strong>: <\/p>\n\n\n\n
WHERE date_column >= '2024-01-01' AND date_column < '2025-01-01'<\/code><\/pre>\n\n\n\n\u06f9. \u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc \u0648 \u062f\u0650-\u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc \u062f\u0627\u062f\u0647\u200c\u0647\u0627<\/strong><\/h3>\n\n\n\n
- \n
- \u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc<\/strong>: \u06cc\u06a9\u06cc \u0627\u0632 \u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u0627\u0633\u062a \u06a9\u0647 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0631\u0627 \u0628\u0647 \u06a9\u0648\u0686\u06a9\u062a\u0631\u06cc\u0646 \u0648\u0627\u062d\u062f\u0647\u0627\u06cc \u062e\u0648\u062f \u062a\u062c\u0632\u06cc\u0647 \u0645\u06cc\u200c\u06a9\u0646\u062f \u062a\u0627 \u0627\u0632 \u062a\u06a9\u0631\u0627\u0631 \u0648 \u0627\u0641\u0632\u0648\u0646\u06af\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u06a9\u0646\u062f. \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u062f.<\/li>\n\n\n\n
- \u062f\u0650-\u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc<\/strong>: \u062f\u0631 \u0628\u0631\u062e\u06cc \u0645\u0648\u0627\u0631\u062f\u060c \u0628\u0631\u0627\u06cc \u0628\u0647\u0628\u0648\u062f \u0633\u0631\u0639\u062a \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0627\u0632 \u062f\u0650-\u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f \u06a9\u0647 \u0628\u0647 \u0645\u0639\u0646\u06cc \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0628\u0631\u062e\u06cc \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0627\u0636\u0627\u0641\u06cc \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 JOIN\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0627\u0633\u062a.<\/li>\n<\/ul>\n\n\n\n
\u06f1\u06f0. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 UNION ALL \u0628\u0647 \u062c\u0627\u06cc UNION<\/strong><\/h3>\n\n\n\n
\u0627\u06af\u0631 \u0646\u06cc\u0627\u0632\u06cc \u0628\u0647 \u062d\u0630\u0641 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc \u062a\u06a9\u0631\u0627\u0631\u06cc \u0646\u062f\u0627\u0631\u06cc\u062f\u060c \u0628\u0647\u062a\u0631 \u0627\u0633\u062a \u0628\u0647 \u062c\u0627\u06cc
UNION<\/code> \u0627\u0632UNION ALL<\/code> \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.UNION<\/code> \u0627\u0628\u062a\u062f\u0627 \u0628\u0627\u06cc\u062f \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0631\u0627 \u0645\u0642\u0627\u06cc\u0633\u0647 \u06a9\u0631\u062f\u0647 \u0648 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc \u062a\u06a9\u0631\u0627\u0631\u06cc \u0631\u0627 \u062d\u0630\u0641 \u06a9\u0646\u062f \u06a9\u0647 \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0632\u0645\u0627\u0646 \u0628\u06cc\u0634\u062a\u0631\u06cc \u0645\u06cc\u200c\u06af\u06cc\u0631\u062f.<\/p>\n\n\n\n\u06f1\u06f1. \u0627\u06cc\u062c\u0627\u062f View\u0647\u0627 \u0628\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647<\/strong><\/h3>\n\n\n\n
\u0627\u06cc\u062c\u0627\u062f View\u0647\u0627 (\u0646\u0645\u0627\u06cc\u0647\u200c\u0647\u0627) \u0628\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u062e\u0648\u0627\u0646\u0627\u06cc\u06cc \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0628\u0628\u062e\u0634\u062f. \u0647\u0645\u0686\u0646\u06cc\u0646 \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u0648 \u06a9\u0627\u0647\u0634 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u06a9\u0645\u06a9 \u06a9\u0646\u062f\u060c \u0686\u0631\u0627 \u06a9\u0647 \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0622\u0646 \u0631\u0627 \u0627\u0632 \u067e\u06cc\u0634 \u0645\u062d\u0627\u0633\u0628\u0647 \u0648 \u0630\u062e\u06cc\u0631\u0647 \u06a9\u0646\u062f.<\/p>\n\n\n\n
\u06f1\u06f2. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Stored Procedure\u0647\u0627<\/strong><\/h3>\n\n\n\n
Stored Procedure\u0647\u0627 \u06cc\u0627 \u062a\u0648\u0627\u0628\u0639 \u0630\u062e\u06cc\u0631\u0647\u200c\u0634\u062f\u0647 \u0628\u0647 \u062f\u0644\u06cc\u0644 \u0627\u062c\u0631\u0627\u06cc \u0645\u06a9\u0631\u0631 \u062f\u0631 \u0633\u0637\u062d \u0633\u0631\u0648\u0631 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0627\u0645\u067e\u0627\u06cc\u0644\u200c\u0647\u0627\u06cc \u0627\u0632 \u067e\u06cc\u0634 \u0627\u0646\u062c\u0627\u0645\u200c\u0634\u062f\u0647\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0647 \u0628\u0647\u0628\u0648\u062f \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0648 \u06a9\u0627\u0647\u0634 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u06a9\u0645\u06a9 \u06a9\u0646\u0646\u062f.<\/p>\n\n\n\n
\u06f1\u06f3. \u06a9\u0627\u0647\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 DISTINCT<\/strong><\/h3>\n\n\n\n
\u0639\u0628\u0627\u0631\u062a
DISTINCT<\/code> \u0628\u0631\u0627\u06cc \u062d\u0630\u0641 \u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc \u062a\u06a9\u0631\u0627\u0631\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f\u060c \u0627\u0645\u0627 \u062f\u0631 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0634\u062f\u062a \u0628\u0627\u0639\u062b \u06a9\u0627\u0647\u0634 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0634\u0648\u062f. \u0627\u06af\u0631 \u0645\u0637\u0645\u0626\u0646 \u0647\u0633\u062a\u06cc\u062f \u06a9\u0647 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0627\u0632 \u0627\u0628\u062a\u062f\u0627 \u062a\u06a9\u0631\u0627\u0631\u06cc \u0646\u06cc\u0633\u062a\u0646\u062f\u060c \u0627\u0632 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u063a\u06cc\u0631\u0636\u0631\u0648\u0631\u06cc \u0627\u0632DISTINCT<\/code> \u0627\u062c\u062a\u0646\u0627\u0628 \u06a9\u0646\u06cc\u062f.<\/p>\n\n\n\n\u06f1\u06f4. \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc Subquery\u0647\u0627 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 JOIN<\/strong><\/h3>\n\n\n\n
\u06af\u0627\u0647\u06cc \u0627\u0648\u0642\u0627\u062a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Subquery\u0647\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0627\u0639\u062b \u06a9\u0627\u0647\u0634 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0634\u0648\u062f. \u062f\u0631 \u0686\u0646\u06cc\u0646 \u0634\u0631\u0627\u06cc\u0637\u06cc\u060c \u062a\u0628\u062f\u06cc\u0644 Subquery\u0647\u0627 \u0628\u0647 JOIN\u0647\u0627\u06cc \u0645\u0646\u0627\u0633\u0628 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u06a9\u0627\u0631\u0627\u06cc\u06cc \u06a9\u0648\u0626\u0631\u06cc \u0631\u0627 \u0627\u0641\u0632\u0627\u06cc\u0634 \u062f\u0647\u062f.<\/p>\n\n\n\n
\u0645\u062b\u0627\u0644 Subquery \u0636\u0639\u06cc\u0641<\/strong>:<\/p>\n\n\n\n
SELECT name FROM users WHERE id IN (SELECT user_id FROM orders);<\/code><\/pre>\n\n\n\n\u0645\u062b\u0627\u0644 \u0628\u0647\u062a\u0631 \u0628\u0627 JOIN<\/strong>:<\/p>\n\n\n\n
SELECT users.name FROM users JOIN orders ON users.id = orders.user_id;<\/code><\/pre>\n\n\n\n\u06f1\u06f5. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Caching<\/strong><\/h3>\n\n\n\n
\u0627\u06af\u0631 \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc\u06cc \u062f\u0627\u0631\u06cc\u062f \u06a9\u0647 \u0628\u0647 \u062f\u0641\u0639\u0627\u062a \u0632\u06cc\u0627\u062f \u0648 \u0628\u062f\u0648\u0646 \u062a\u063a\u06cc\u06cc\u0631 \u0627\u062c\u0631\u0627 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Caching \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0633\u0631\u0639\u062a \u067e\u0627\u0633\u062e\u200c\u062f\u0647\u06cc \u0631\u0627 \u0628\u0647 \u0634\u062f\u062a \u0627\u0641\u0632\u0627\u06cc\u0634 \u062f\u0647\u062f. \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u06a9\u0634 \u0645\u0627\u0646\u0646\u062f Redis \u06cc\u0627 Memcached \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0647 \u0630\u062e\u06cc\u0631\u0647\u200c\u0633\u0627\u0632\u06cc \u0646\u062a\u0627\u06cc\u062c \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u06a9\u0645\u06a9 \u06a9\u0646\u0646\u062f.<\/p>\n\n\n\n
\u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc<\/h2>\n\n\n\n
- \n
- SQL Profiler (SQL Server)<\/a><\/strong>: \u0627\u0628\u0632\u0627\u0631\u06cc \u0628\u0631\u0627\u06cc \u0645\u0627\u0646\u06cc\u062a\u0648\u0631\u06cc\u0646\u06af \u0648 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u062f\u0631 SQL Server.<\/li>\n\n\n\n
- EXPLAIN (MySQL\/PostgreSQL)<\/strong>: \u0641\u0631\u0645\u0627\u0646\u06cc \u06a9\u0647 \u0628\u0631\u0627\u06cc \u062a\u062d\u0644\u06cc\u0644 \u0648 \u0645\u0634\u0627\u0647\u062f\u0647 Execution Plan \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u062f\u0631 \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u067e\u0633\u062a\u06af\u0631\u0633 \u0648 MySQL \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/li>\n\n\n\n
- Performance Schema (MySQL)<\/a><\/strong>: \u0627\u0628\u0632\u0627\u0631\u06cc \u0628\u0631\u0627\u06cc \u062a\u062d\u0644\u06cc\u0644 \u0639\u0645\u0644\u06a9\u0631\u062f \u0648 \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u0645\u0634\u06a9\u0644\u0627\u062a \u06a9\u0627\u0631\u0627\u06cc\u06cc \u062f\u0631 MySQL.<\/li>\n<\/ul>\n\n\n\n
\u062c\u0645\u0639\u200c\u0628\u0646\u062f\u06cc<\/h3>\n\n\n\n
\u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u062f\u0631 \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633\u200c\u0647\u0627\u06cc \u0631\u0627\u0628\u0637\u0647\u200c\u0627\u06cc \u0646\u0647 \u062a\u0646\u0647\u0627 \u0628\u0627\u0639\u062b \u0627\u0641\u0632\u0627\u06cc\u0634 \u0633\u0631\u0639\u062a \u0648 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0633\u06cc\u0633\u062a\u0645 \u0645\u06cc\u200c\u0634\u0648\u062f\u060c \u0628\u0644\u06a9\u0647 \u0628\u0647 \u06a9\u0627\u0647\u0634 \u0647\u0632\u06cc\u0646\u0647\u200c\u0647\u0627 \u0648 \u0628\u0647\u0628\u0648\u062f \u062a\u062c\u0631\u0628\u0647 \u06a9\u0627\u0631\u0628\u0631\u06cc \u0646\u06cc\u0632 \u06a9\u0645\u06a9 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0645\u0627\u0646\u0646\u062f \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u06af\u0630\u0627\u0631\u06cc\u060c \u06a9\u0627\u0647\u0634 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u060c \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc JOIN\u0647\u0627 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Execution Plan \u0627\u0632 \u0645\u0647\u0645\u200c\u062a\u0631\u06cc\u0646 \u0631\u0627\u0647\u06a9\u0627\u0631\u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0647\u0633\u062a\u0646\u062f.<\/p>\n\n\n\n
\u0628\u0627 \u0627\u062c\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0627\u0635\u0648\u0644 \u0648 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u062e\u0648\u062f \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647\u06cc \u0628\u0647\u0628\u0648\u062f \u0628\u0628\u062e\u0634\u06cc\u062f \u0648 \u0627\u0632 \u0645\u0646\u0627\u0628\u0639 \u0633\u06cc\u0633\u062a\u0645 \u062e\u0648\u062f \u0628\u0647 \u0628\u0647\u062a\u0631\u06cc\u0646 \u0634\u06a9\u0644 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u062f\u0631 \u0627\u06cc\u0646 \u0645\u0637\u0644\u0628 \u0628\u0647 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627 \u0648 \u0627\u0635\u0648\u0644 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u062e\u0648\u0627\u0647\u06cc\u0645 \u067e\u0631\u062f\u0627\u062e\u062a \u0648 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc\u06cc \u0631\u0627 \u06a9\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 (DBMS) \u0631\u0627 \u0627\u0641\u0632\u0627\u06cc\u0634 \u062f\u0647\u062f\u060c \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.<\/p>\n","protected":false},"author":12,"featured_media":3999,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64,1],"tags":[],"coauthors":[],"class_list":["post-3803","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database","category-articles"],"yoast_head":"\n
\u0627\u0641\u0632\u0627\u06cc\u0634 \u0633\u0631\u0639\u062a \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633: \u0627\u0635\u0648\u0644 \u0648 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc - \u0628\u0644\u0627\u06af \u0647\u0645\u200c\u0631\u0648\u0634<\/title>\n<meta name=\"description\" content=\"\u062f\u0631 \u0627\u06cc\u0646 \u0645\u0637\u0644\u0628 \u0628\u0647 \u0628\u0631\u0631\u0633\u06cc \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627 \u0648 \u0627\u0635\u0648\u0644 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u062e\u0648\u0627\u0647\u06cc\u0645 \u067e\u0631\u062f\u0627\u062e\u062a \u0648 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0627\u0641\u0632\u0627\u06cc\u0634 \u0633\u0631\u0639\u062a \u06a9\u0648\u0626\u0631\u06cc \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hamravesh.com\/blog\/optimize-database-query\/\" \/>\n<meta property=\"og:locale\" content=\"fa_IR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0627\u0641\u0632\u0627\u06cc\u0634 \u0633\u0631\u0639\u062a \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u06cc \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633: \u0627\u0635\u0648\u0644 \u0648 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc\" \/>\n<meta property=\"og:description\" content=\"\u062f\u0631 \u0627\u06cc\u0646 \u0645\u0637\u0644\u0628 \u0628\u0647 \u0628\u0631\u0631\u0633\u06cc \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627 \u0648 \u0627\u0635\u0648\u0644 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0648\u0626\u0631\u06cc \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u062e\u0648\u0627\u0647\u06cc\u0645 \u067e\u0631\u062f\u0627\u062e\u062a \u0648 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0627\u0641\u0632\u0627\u06cc\u0634 \u0633\u0631\u0639\u062a \u06a9\u0648\u0626\u0631\u06cc \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hamravesh.com\/blog\/optimize-database-query\/\" \/>\n<meta property=\"og:site_name\" content=\"\u0628\u0644\u0627\u06af \u0647\u0645\u200c\u0631\u0648\u0634\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-09T09:08:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-11-09T09:13:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hamravesh.com\/blog\/wp-content\/uploads\/2024\/10\/optimization-database-query-scaled.webp\" 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- \u062f\u0650-\u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc<\/strong>: \u062f\u0631 \u0628\u0631\u062e\u06cc \u0645\u0648\u0627\u0631\u062f\u060c \u0628\u0631\u0627\u06cc \u0628\u0647\u0628\u0648\u062f \u0633\u0631\u0639\u062a \u0627\u062c\u0631\u0627\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0627\u0632 \u062f\u0650-\u0646\u0631\u0645\u0627\u0644\u200c\u0633\u0627\u0632\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f \u06a9\u0647 \u0628\u0647 \u0645\u0639\u0646\u06cc \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0628\u0631\u062e\u06cc \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0627\u0636\u0627\u0641\u06cc \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 JOIN\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0627\u0633\u062a.<\/li>\n<\/ul>\n\n\n\n
- \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u06af\u0630\u0627\u0631\u06cc \u0631\u0648\u06cc \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u067e\u06cc\u0648\u0633\u062a\u06cc (Join Keys)<\/strong>: \u0628\u0627 \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u06af\u0630\u0627\u0631\u06cc \u0631\u0648\u06cc \u0633\u062a\u0648\u0646\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u062f\u0631 JOIN\u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u06a9\u0627\u0631\u0627\u06cc\u06cc \u06a9\u0648\u0626\u0631\u06cc\u200c\u0647\u0627 \u0631\u0627 \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u06cc\u062f.<\/li>\n<\/ul>\n\n\n\n
- \u0627\u06cc\u0646\u062f\u06a9\u0633\u200c\u0647\u0627\u06cc Hash<\/strong>: \u0628\u0631\u0627\u06cc \u062c\u0633\u062a\u062c\u0648\u0647\u0627\u06cc \u062f\u0642\u06cc\u0642 \u0648 \u0645\u0637\u0627\u0628\u0642\u062a\u200c\u0647\u0627\u06cc \u0628\u0631\u0627\u0628\u0631 \u0633\u0631\u06cc\u0639\u200c\u062a\u0631\u06cc\u0646 \u06af\u0632\u06cc\u0646\u0647 \u0647\u0633\u062a\u0646\u062f.<\/li>\n<\/ul>\n\n\n
- \u06a9\u0627\u0647\u0634 \u0645\u0635\u0631\u0641 \u0645\u0646\u0627\u0628\u0639 \u0633\u06cc\u0633\u062a\u0645<\/strong>: \u0628\u0627 \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0646\u0627\u0628\u0639\u06cc \u0645\u0627\u0646\u0646\u062f CPU\u060c \u062d\u0627\u0641\u0638\u0647 \u0648 I\/O \u0628\u0647 \u062d\u062f\u0627\u0642\u0644 \u0645\u06cc\u200c\u0631\u0633\u062f.<\/li>\n\n\n\n