1. OUTPUT ... INTO

用于将一条记录从表一移动到表二时非常好用，常见于备份记录的应用

例一：

DELETE [TableUseing]

OUTPUT *

INTO [TableBak]

例二：(用于移动时修改某字段的值)

DELETE [TableUseing]

OUTPUT Field1, Field2, GETDATE()

INTO [TableBak]

2.表变量

用于存储临时的查询结果

DECLARE @tmp TABLE (ID INT, CITY NVARCHAR(50))

INSERT INTO @tmp

SELECT MIN(ID), CITY

FROM [TableTest] WITH(NOCLOCK)

GROUP BY CITY