Question

我有两张桌子：

表1：

---------------------------
|id_column1 | name_column |
---------------------------
|        1  | my_name1    |
|        2  | my_name2    |
---------------------------

表2：

--------------------------------------
|id_column2 | surname_column | fk_id1|
--------------------------------------
|      111  | my_surname1    | 1     |
|      222  | my_surname2    | 2     |
--------------------------------------
fk_id1 is foreign key referenced to table1.id_column1

SELECT * FROM table1 WHERE fk_id1=1;

--------------------------------------
|id_column2 | surname_column | fk_id1|
--------------------------------------
|      111  | my_surname1    | 1     |

我怎样才能得到这个（完全可以将两个表列连接起来）：

------------------------------------------------
|id_column2 | surname_column | fk_id1| name    |
------------------------------------------------
|      111  | my_surname1    | 1     |my_name1 |

如下所示：

SELECT * FROM table2 WHERE fk_id1=1 AND SELECT name FROM table1 WHERE id_column1=1;

Answer 1

SELECT id_column2,surname_column,fk_id1,name_column FROM table1,table2 WHERE table1.id_column1=table2.fk_id1 AND table1.id_column1=1;

Answer 2

你的意思是这样的吗？

SELECT t2.*, t1.name_column 
FROM table2 t2 
     INNER JOIN table1 t1 on t2.fk_id1 = id_column1 
WHERE t1.id_column1 = 1

以下是用于测试的示例SQL Fiddle。

Answer 3

这很简单。可以使用内部连接完成。

SELECT id_column2,surname_column,fk_id1,name_column as name FROM table1 Inner Join table2 on table1.id_column1=table2.fk_id1 where table1.id_column1=1;

或者

SELECT id_column2,surname_column,fk_id1,name_column as name FROM table1 , table2 where table1.id_column1=table2.fk_id1 and table1.id_column1=1;

如果您希望得到以下格式的结果：

------------------------------------------------
|id_column2 | surname_column | fk_id1| name    |
------------------------------------------------
|      111  | my_surname1    | 1     |my_name1 |

SQL如何连接两个不同的表列作为结果

3 个答案: