<\/span>\n \u062a\u06a9\u0646\u06cc\u06a9 \u0647\u0627\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648
\n<\/span><\/h3>\n\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc SQL \u06cc\u06a9 \u0645\u0647\u0627\u0631\u062a \u062d\u06cc\u0627\u062a\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u0627\u0646 \u0648 \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u06af\u0627\u0646 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0627\u0633\u062a. \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0641\u0631\u0627\u062a\u0631 \u0627\u0632 \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0627\u0648\u0644\u06cc\u0647 \u0648 \u0628\u0627\u0632\u0622\u0641\u0631\u06cc\u0646\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0627\u0633\u062a \u0648 \u0637\u06cc\u0641 \u0648\u0633\u06cc\u0639\u06cc \u0627\u0632 \u062a\u06a9\u0646\u06cc\u06a9 \u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0631\u0627 \u0634\u0627\u0645\u0644 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n
<\/span>\n 1. \u0637\u0631\u062d \u0647\u0627\u06cc \u0627\u062c\u0631\u0627\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648
\n<\/span><\/h4>\n\u062f\u0631\u06a9 \u0637\u0631\u062d \u0627\u062c\u0631\u0627\u06cc \u06cc\u06a9 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0628\u0631\u0627\u06cc \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a. \u0637\u0631\u062d \u0627\u062c\u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0645\u0648\u062a\u0648\u0631 SQL \u06cc\u06a9 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u06af\u0644\u0648\u06af\u0627\u0647 \u0647\u0627\u06cc \u0628\u0627\u0644\u0642\u0648\u0647 \u0631\u0627 \u0622\u0634\u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n
\n- \n
\u062a\u0648\u0636\u06cc\u062d<\/strong>: EXPLAIN<\/code> \u0628\u06cc\u0627\u0646\u06cc\u0647 \u0628\u06cc\u0646\u0634\u06cc \u062f\u0631 \u0645\u0648\u0631\u062f \u0646\u062d\u0648\u0647 \u0627\u062c\u0631\u0627\u06cc \u06cc\u06a9 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f \u0648 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0646\u0627\u06a9\u0627\u0631\u0622\u0645\u062f\u06cc \u0647\u0627 \u0631\u0627 \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u06a9\u0646\u06cc\u062f.<\/p>\nEXPLAIN<\/span> SELECT<\/span> column1<\/span>,<\/span> column2<\/span> FROM<\/span> table_name<\/span> WHERE<\/span> condition<\/span>;<\/span>\n<\/code><\/pre>\n<\/li>\n- \n
\u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644<\/strong>: ANALYZE<\/code> \u0628\u06cc\u0627\u0646\u06cc\u0647\u060c \u06a9\u0647 \u062f\u0631 \u0627\u0631\u062a\u0628\u0627\u0637 \u0628\u0627 EXPLAIN<\/code>\u060c \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u0622\u0645\u0627\u0631 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627 \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f \u0648 \u062f\u0631\u06a9 \u0639\u0645\u06cc\u0642 \u062a\u0631\u06cc \u0627\u0632 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f.<\/p>\nEXPLAIN<\/span> ANALYZE<\/span> SELECT<\/span> column1<\/span>,<\/span> column2<\/span> FROM<\/span> table_name<\/span> WHERE<\/span> condition<\/span>;<\/span>\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<\/span>\n 2. Subquery Optimization
\n<\/span><\/h4>\n\u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u0641\u0631\u0639\u06cc \u06af\u0627\u0647\u06cc \u0627\u0648\u0642\u0627\u062a \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0627 \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u06cc\u0627 \u0628\u0627 WITH<\/code> \u0628\u0646\u062f (\u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9).<\/p>\n\n- \n
\u062c\u0627\u06cc\u06af\u0632\u06cc\u0646\u06cc \u0633\u0648\u0627\u0644\u0627\u062a \u0641\u0631\u0639\u06cc \u0628\u0627 Join<\/strong>:<\/p>\n-- Subquery<\/span>\nSELECT<\/span> *<\/span> FROM<\/span> table1<\/span> WHERE<\/span> column1<\/span> IN<\/span> (<\/span>SELECT<\/span> column1<\/span> FROM<\/span> table2<\/span>);<\/span>\n\n-- Equivalent Join<\/span>\nSELECT<\/span> table1<\/span>.<\/span>*<\/span> FROM<\/span> table1<\/span> INNER<\/span> JOIN<\/span> table2<\/span> ON<\/span> table1<\/span>.<\/span>column1<\/span> =<\/span> table2<\/span>.<\/span>column1<\/span>;<\/span>\n<\/code><\/pre>\n<\/li>\n- \n
\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0631\u0627\u06cc\u062c (CTEs)<\/strong>:<\/p>\nWITH<\/span> CTE<\/span> AS<\/span> (<\/span>\n SELECT<\/span> column1<\/span>,<\/span> column2<\/span> FROM<\/span> table_name<\/span> WHERE<\/span> condition<\/span>\n)<\/span>\nSELECT<\/span> *<\/span> FROM<\/span> CTE<\/span> WHERE<\/span> another_condition<\/span>;<\/span>\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<\/span>\n 3. \u0627\u0633\u062a\u0631\u0627\u062a\u0698\u06cc \u0647\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc
\n<\/span><\/h4>\n\u0627\u0633\u062a\u0631\u0627\u062a\u0698\u06cc \u0647\u0627\u06cc \u0646\u0645\u0627\u06cc\u0647 \u0633\u0627\u0632\u06cc \u067e\u06cc\u0634\u0631\u0641\u062a\u0647 \u0634\u0627\u0645\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0646\u0645\u0627\u06cc\u0647 \u0647\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0648 \u0646\u0645\u0627\u06cc\u0647 \u0647\u0627\u06cc \u067e\u0648\u0634\u0634\u06cc \u0627\u0633\u062a.<\/p>\n
\n- \n
\u0634\u0627\u062e\u0635 \u062a\u0631\u06a9\u06cc\u0628\u06cc<\/strong>: \u0627\u06cc\u0646\u062f\u06a9\u0633 \u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0634\u0627\u0645\u0644 \u0686\u0646\u062f\u06cc\u0646 \u0633\u062a\u0648\u0646 \u0647\u0633\u062a\u0646\u062f \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc\u06cc \u0631\u0627 \u06a9\u0647 \u0631\u0648\u06cc \u0622\u0646 \u0633\u062a\u0648\u0646 \u0647\u0627 \u0641\u06cc\u0644\u062a\u0631 \u0645\u06cc \u06a9\u0646\u0646\u062f \u0633\u0631\u0639\u062a \u0628\u0628\u062e\u0634\u0646\u062f.<\/p>\nCREATE<\/span> INDEX<\/span> idx_composite<\/span> ON<\/span> table_name<\/span> (<\/span>column1<\/span>,<\/span> column2<\/span>);<\/span>\n<\/code><\/pre>\n<\/li>\n- \n
\u0634\u0627\u062e\u0635 \u067e\u0648\u0634\u0634<\/strong>: \u0634\u0627\u062e\u0635\u06cc \u06a9\u0647 \u0634\u0627\u0645\u0644 \u062a\u0645\u0627\u0645 \u0633\u062a\u0648\u0646 \u0647\u0627\u06cc \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0634\u062f\u0647 \u062a\u0648\u0633\u0637 \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0628\u0627\u0634\u062f \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \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.<\/p>\nCREATE<\/span> INDEX<\/span> idx_covering<\/span> ON<\/span> table_name<\/span> (<\/span>column1<\/span>,<\/span> column2<\/span>,<\/span> column3<\/span>);<\/span>\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<\/span>\n 4. \u067e\u0627\u0631\u062a\u06cc\u0634\u0646 \u0628\u0646\u062f\u06cc
\n<\/span><\/h4>\n\u062a\u0642\u0633\u06cc\u0645 \u0628\u0646\u062f\u06cc \u06cc\u06a9 \u062c\u062f\u0648\u0644 \u0628\u0632\u0631\u06af \u0628\u0647 \u0642\u0637\u0639\u0627\u062a \u06a9\u0648\u0686\u06a9\u062a\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0645\u062f\u06cc\u0631\u06cc\u062a \u062a\u0631 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0631\u0627 \u0628\u0627 \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u0645\u0642\u062f\u0627\u0631 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0627\u0633\u06a9\u0646 \u0634\u062f\u0647 \u0628\u0647\u0628\u0648\u062f \u0628\u062e\u0634\u062f.<\/p>\n
\n- \n
\u067e\u0627\u0631\u062a\u06cc\u0634\u0646 \u0628\u0646\u062f\u06cc \u0645\u062d\u062f\u0648\u062f\u0647<\/strong>:<\/p>\nCREATE<\/span> TABLE<\/span> orders<\/span> (<\/span>\n order_id<\/span> INT<\/span>,<\/span>\n order_date<\/span> DATE<\/span>,<\/span>\n ...<\/span>\n)<\/span> PARTITION<\/span> BY<\/span> RANGE<\/span> (<\/span>order_date<\/span>)<\/span> (<\/span>\n PARTITION<\/span> p0<\/span> VALUES<\/span> LESS<\/span> THAN<\/span> (<\/span>'2024-01-01'<\/span>),<\/span>\n PARTITION<\/span> p1<\/span> VALUES<\/span> LESS<\/span> THAN<\/span> (<\/span>'2025-01-01'<\/span>),<\/span>\n ...<\/span>\n