SQL选择复杂插入

Question

我试图用1个mysql命令将2个表连接成1个表。我还想将文件路径连接到新表中的一个路径。任何信息都有帮助。谢谢。

这样的事情：

INSERT INTO table3 VALUES (Location) SELECT "A.Loc_Path B._FilePath" FROM Table2 A INNER JOIN table1 B ON A._Loc_ID = B._Loc_ID

我想采取表1和表1 2并创建表3

表1

| ID | _FilePath        | _Loc_ID |
| 1  | 001\yay\txt.html |    1    | 
| 1  | 002\yay\txt.php  |    2    |

表2

| _Loc_ID | Loc_Path           |
|    1    | D:\documents\test\ |
|    2    | C:\Temp\test\      |

表3

|  Id  | Location                           |
|   1  | D:\documents\test\001\yay\txt.html |
|   2  | C:\Temp\test\002\yay\txt.php       | 

Answer 1

使用concat

INSERT INTO table3 (Location) SELECT concat (A.Loc_Path , B._FilePath)  
FROM Table2 A INNER JOIN table1 B ON A._Loc_ID = B._Loc_ID

Answer 2

您需要使用concat function来连接两列：

INSERT INTO table3 VALUES (Location) SELECT CONCAT(A.Loc_Path, B._FilePath) FROM 
  Table2 A INNER JOIN table1 B ON A._Loc_ID = B._Loc_ID