使用它们的表名作为新字段组合两个（多个）表

Question

我有两张不同的桌子：car 和 bike。我想加入这两个表并将它们的表名用作字段名。

car
| id | brand       | 
--------------------
|  1 | mercedes    |     
|  2 | bmw         |    
|  3 | audi        |

bike
| id | brand       | 
--------------------
|  1 | mercedes    |     
|  2 | bmw         |    
|  3 | audi        |

我想要的选择结果：

| id | vId | brand     | type |
-------------------------------
|  1 |  1  | mercedes  | bike | 
|  2 |  2  | bmw       | bike |
|  3 |  3  | harley    | bike |
|  4 |  1  | mercedes  | car  |  
|  5 |  2  | bmw       | car  | 
|  6 |  3  | audi      | car  |

感谢您的帮助。

Answer 1

您可以使用 UNION ALL 运算符。 UNION 运算符用于组合两个或多个查询的结果集

  set @pos=0;

 select @pos:=@pos+1 as id ,bikecar.vid, bikecar.brand,bikecar.type
 from
 (
  select id as Vid,brand,'CAR' as type from car 
    union all 
  select id as Vid,brand,'Bike' as type  from bike 
 ) bikecar

Answer 2

你需要使用UNION ALL

SELECT id, brand, 'car' AS type FROM car
UNION ALL
SELECT id, brand, 'bike' AS type FROM bike