选择使用UNION QUERY

Question

我想在SQL Server中使用以下查询创建一个新表.我无法理解为什么这个查询不起作用.

Query1:工作

SELECT * FROM TABLE1
UNION
SELECT * FROM TABLE2 

Query2:不起作用.错误:Msg 170, Level 15, State 1, Line 7 Line 7: Incorrect syntax near ')'.

SELECT * INTO [NEW_TABLE]
FROM
(
SELECT * FROM TABLE1
UNION
SELECT * FROM TABLE2
)

谢谢!

Answer 1

您必须在SQL Server中为派生表定义表别名:

SELECT x.* 
  INTO [NEW_TABLE]
  FROM (SELECT * FROM TABLE1
        UNION
        SELECT * FROM TABLE2) x

"x"是此示例中的表别名.