sql server 2005中Delete语句可以添加一个top参数
以下示例删除 Testdb 表中所有行的 10%。
--生成测试数据库
Create database Testdb
go
USE [Testdb]
GO
--生成测试表
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[TestDelete](
[PKID] [int] IDENTITY(1,1) NOT NULL,
[TestID] [int] NULL,
[testString] [nvarchar](50) NULL,
CONSTRAINT [PK_TestDelere] PRIMARY KEY CLUSTERED
(
[PKID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
go
--插入测试数据
declare @tmpID int
set @tmpID=1
WHILE ( (SELECT max(PKID) FROM TestDelete)<2000 )
BEGIN
set @tmpID=@tmpID+2
insert into [TestDelete] ([TestID],[testString]) values(@tmpID,cast(@tmpID as nvarchar(10)))
CONTINUE
END
select count(*) from TestDelete
go
--删除测试数据
--以下示例删除 Testdb 表中所有行的 10%。
DELETE TOP (10) PERCENT FROM TestDelete
GO
--下面这句执行错误
----DELETE TOP (10) PERCENT FROM TestDelete order by PKID desc
----GO
select count(*) from TestDelete
go
--删除测试数据库
----drop database Testdb
----go
微软的开发人员真的很奇怪？不得而知。一个奇怪的语句。
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/downmoon/archive/2007/12/14/1936210.aspx
本文参考链接：https://blog.csdn.net/faunjoe/article/details/4535354
