mysql join 3表

Question

如何連接三個具有一個公共列（id）的mysql表，例如，從Table1中選擇a，b，從table2中選擇c，d，從table3中選擇e，f，其中id = X 感謝

Answer 1

SELECT `table1`.`a`,`table2`.`c` ..... 
FROM `table1` JOIN `table2` USING(`id`) JOIN `table3` USING(`id`) 
WHERE `id` = x 

Answer 2

SELECT t1.a, t1.b, t2.c, t2.d, t3.e, t3.f 
    FROM table1 t1, table2 t2, table3 t3 
WHERE t1.id = t2.id 
    AND t2.id = t3.id 
    AND t3.id = x 

Answer 3

SELECT t1.a, t1.b, t2.c, t2.d, t3.e, t3.f 
FROM `table1` t1 
JOIN `table2` t2 ON t1.id = t2.id 
JOIN `table3` t3 ON t1.id = t3.id 
WHERE t1.id = x 

Answer 4

SELECT t1.a, t1.b, t2.c, t2.d, t3.e, t3.f 
    FROM table1 t1 
    JOIN table2 t2 ON (t1.id = t2.id) 
    JOIN table3 t3 ON (t1.id = t3.id) 
    ORDER BY t1.id; 

Answer 5

SELECT col1,col2,col3 (select any col from any table) 
FROM t1 INNER JOIN t2,t3 
WHERE t1.id = t2.id 
AND t1.id = t3.id; 

Answer 6

請嘗試此查詢：

SELECT product_details.product_id, product_name.pro_name,categories.cat_name 
     FROM product_details 
     INNER JOIN product_name 
     ON product_details.product_id=product_name.id INNER JOIN categories ON product_details.categories_id=categories.id order by product_details.id;