本文介绍了SQL Server 2005中少数人用到的两条精品新语法,大家看看自己是否知道呢……
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