Question

我有3个包含以下列的表

TableA
Name Description .....
TableB
Name Description ....
TableC
Name Description ....

我想在我选择的位置执行选择查询这三个表中的名称和描述如果名称包含我的查询。

Answer 1

SELECT Name, Description
    FROM TableA
    WHERE Name LIKE '%YourSearch%'
UNION ALL
SELECT Name, Description
    FROM TableB
    WHERE Name LIKE '%YourSearch%'
UNION ALL
SELECT Name, Description
    FROM TableC
    WHERE Name LIKE '%YourSearch%'

Answer 2

你的描述有点不清楚，但听起来你想要一个联盟

SELECT  Name, Description FROM TableA where Name = @myNameFilter
  UNION ALL
SELECT  Name, Description FROM TableB where Name = @myNameFilter
  UNION ALL
SELECT  Name, Description FROM TableC where Name = @myNameFilter

目前尚不清楚是否需要重复（可能是UNION而不是UNION ALL）。

Answer 3

我认为这就是你所要求的。

select * from tableA where name = 'Foo'
Union
select * from tableB where name = 'Foo'
Union
select * from tableC where name = 'Foo'

Answer 4

假设您希望表tableA，tableB和tableC中名称包含某个单词的所有Name，Description列，它应该是这样的：

select Name, Description from TableA where Name like concat('%', word, '%')
UNION
select Name, Description from TableB where Name like concat('%', word, '%')
UNION
select Name, Description from TableC where Name like concat('%', word, '%')

SQL从名称包含查询的多个表中选择

4 个答案: