\u062f\u0631 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0637\u0631\u0627\u062d\u06cc\u200c\u0647\u0627\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647\u060c \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0628\u0631 \u0627\u0633\u0627\u0633 \u0627\u0631\u062a\u0628\u0627\u0637 \u0628\u06cc\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u062f\u0631 \u062c\u062f\u0648\u0644\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0630\u062e\u06cc\u0631\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f. \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u0627\u063a\u0644\u0628 \u0646\u06cc\u0627\u0632 \u067e\u06cc\u0634 \u0645\u06cc\u200c\u0622\u06cc\u062f \u06a9\u0647 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0627\u0632 \u0686\u0646\u062f \u062c\u062f\u0648\u0644 \u0628\u0647\u200c\u0635\u0648\u0631\u062a \u0647\u0645\u0632\u0645\u0627\u0646 \u0627\u0633\u062a\u062e\u0631\u0627\u062c \u0634\u0648\u0646\u062f.<\/p>\n
\u06cc\u06a9\u06cc \u0627\u0632 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0631\u0627\u06cc\u062c \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u06a9\u0627\u0631\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062f\u0633\u062a\u0648\u0631 JOIN<\/strong> \u062f\u0631 SQL \u0627\u0633\u062a. JOIN \u0628\u0627 \u062a\u0631\u06a9\u06cc\u0628 \u062c\u062f\u0648\u0644\u200c\u0647\u0627\u060c \u0631\u062f\u06cc\u0641\u200c\u0647\u0627\u06cc\u06cc \u0631\u0627 \u06a9\u0647 \u0628\u0647 \u0647\u0645 \u0645\u0631\u062a\u0628\u0637 \u0647\u0633\u062a\u0646\u062f (\u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0627\u0632 \u0637\u0631\u06cc\u0642 \u06a9\u0644\u06cc\u062f \u062e\u0627\u0631\u062c\u06cc \u0648 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc) \u06a9\u0646\u0627\u0631 \u0647\u0645 \u0642\u0631\u0627\u0631 \u0645\u06cc\u200c\u062f\u0647\u062f.<\/p>\n \u062f\u0631 \u0627\u06cc\u0646 \u0631\u0627\u0647\u0646\u0645\u0627 \u06cc\u0627\u062f \u0645\u06cc\u200c\u06af\u06cc\u0631\u06cc\u062f:<\/p>\n \u0628\u0631\u0627\u06cc \u0627\u0646\u062c\u0627\u0645 \u0627\u06cc\u0646 \u0622\u0645\u0648\u0632\u0634 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u062f:<\/p>\n \u0633\u0627\u062e\u062a\u0627\u0631 \u06a9\u0644\u06cc:<\/p>\n JOIN \u0631\u062f\u06cc\u0641\u200c\u0647\u0627\u06cc\u06cc \u0631\u0627 \u0627\u0632 \u062f\u0648 \u062c\u062f\u0648\u0644 \u062a\u0631\u06a9\u06cc\u0628 \u0645\u06cc\u200c\u06a9\u0646\u062f \u06a9\u0647 \u0634\u0631\u0637 ON \u0628\u0631\u0627\u06cc \u0622\u0646\u200c\u0647\u0627 \u0628\u0631\u0642\u0631\u0627\u0631 \u0628\u0627\u0634\u062f.<\/p>\n \ud83d\udc49 \u0627\u06cc\u0646 \u06a9\u0648\u0626\u0631\u06cc:<\/p>\n \u0631\u0627 \u0646\u0645\u0627\u06cc\u0634 \u0645\u06cc\u200c\u062f\u0647\u062f.<\/p>\n \u0627\u06af\u0631 \u0646\u0627\u0645 \u0633\u062a\u0648\u0646\u200c\u0647\u0627 \u06cc\u06a9\u0633\u0627\u0646 \u0628\u0627\u0634\u062f:<\/p>\n \ud83d\udc49 \u0627\u06cc\u0646 \u06a9\u0648\u0626\u0631\u06cc \u062f\u0631\u0622\u0645\u062f \u0641\u0631\u0648\u0634 \u0631\u0627 \u0645\u062d\u0627\u0633\u0628\u0647 \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/p>\n \u0641\u0642\u0637 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0645\u0634\u062a\u0631\u06a9:<\/p>\n\n
\n\u067e\u06cc\u0634\u200c\u0646\u06cc\u0627\u0632\u0647\u0627<\/h3>\n
\n
\n\u0627\u06cc\u062c\u0627\u062f \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633 \u0648 \u062c\u062f\u0627\u0648\u0644 \u0646\u0645\u0648\u0646\u0647<\/h3>\n
\u0633\u0627\u062e\u062a \u062f\u06cc\u062a\u0627\u0628\u06cc\u0633:<\/h4>\n
CREATE<\/span> DATABASE joinsDB;\r\nUSE joinsDB;<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\u062c\u062f\u0648\u0644 \u0645\u062d\u0635\u0648\u0644\u0627\u062a:<\/h4>\n
CREATE<\/span> TABLE<\/span> products (\r\n productID int<\/span> UNIQUE<\/span>,\r\n productName varchar<\/span>(20<\/span>),\r\n price decimal<\/span> (4<\/span>,2<\/span>),\r\n PRIMARY<\/span> KEY<\/span> (productID)\r\n);<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\u062c\u062f\u0648\u0644 \u062a\u06cc\u0645 \u0641\u0631\u0648\u0634:<\/h4>\n
CREATE<\/span> TABLE<\/span> team (\r\n empID int<\/span> UNIQUE<\/span>,\r\n empName varchar<\/span>(20<\/span>),\r\n productSpecialty int<\/span>,\r\n PRIMARY<\/span> KEY<\/span> (empID),\r\n FOREIGN<\/span> KEY<\/span> (productSpecialty) REFERENCES<\/span> products (productID)\r\n);<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\u062c\u062f\u0648\u0644 \u0641\u0631\u0648\u0634:<\/h4>\n
CREATE<\/span> TABLE<\/span> sales (\r\n saleID int<\/span> UNIQUE<\/span>,\r\n quantity int<\/span>,\r\n productID int<\/span>,\r\n salesperson int<\/span>,\r\n PRIMARY<\/span> KEY<\/span> (saleID),\r\n FOREIGN<\/span> KEY<\/span> (productID) REFERENCES<\/span> products (productID),\r\n FOREIGN<\/span> KEY<\/span> (salesperson) REFERENCES<\/span> team (empID)\r\n);<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n\u0645\u0641\u0647\u0648\u0645 JOIN \u062f\u0631 SQL<\/h3>\n
SELECT<\/span> table1.column1, table2.column2\r\nFROM<\/span> table1\r\nJOIN<\/span> table2\r\nON<\/span> condition<\/span>;<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n\u0645\u062b\u0627\u0644 JOIN \u0633\u0627\u062f\u0647<\/h3>\n
SELECT<\/span> team.empName, products.productName, products.price\r\nFROM<\/span> products\r\nJOIN<\/span> team\r\nON<\/span> products.productID =<\/span> team.productSpecialty;<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n
\n\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 USING<\/h3>\n
SELECT<\/span> sales.saleID, sales.quantity, products.productName, products.price\r\nFROM<\/span> sales\r\nJOIN<\/span> products\r\nUSING<\/span> (productID);<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\nJOIN \u0686\u0646\u062f \u062c\u062f\u0648\u0644<\/h3>\n
SELECT<\/span> sales.saleID,\r\nteam.empName,\r\nproducts.productName,\r\n(sales.quantity *<\/span> products.price)\r\nFROM<\/span> products\r\nJOIN<\/span> sales USING<\/span> (productID)\r\nJOIN<\/span> team ON<\/span> team.productSpecialty =<\/span> sales.productID\r\nWHERE<\/span> team.empID =<\/span> sales.salesperson;<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n\u0627\u0646\u0648\u0627\u0639 JOIN<\/h3>\n
1. INNER JOIN<\/h4>\n
SELECT<\/span> ...\r\nFROM<\/span> sales\r\nJOIN<\/span> team\r\nON<\/span> sales.salesperson =<\/span> team.empID;<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n