SQL SERVER 存储过程实例

由程序中传入以下5个参数

@logName nvarchar(50),
@roleName nvarchar(50),
@userName nvarchar(50),
@beginTime nvarchar(50),
@endTime nvarchar(50)
在存储过程中声明一个变量：declare @strSql nvarchar(200)
根据传入的参数的有无，为该变量进行赋值，

set @strSql = 'select logId as 日志编号,logName as 日志名称,roleName as 操作人角色,userName as 操作人名,logObj as 操作对象,beginState as 操作前, endState as 操作后,logNotes as 操作结果, logTime as 操作时间 from tb_Log where notes = '''' '

if @logName != ''
set @strSql = @strSql + 'and logName ='''+ @logName +''''
if @roleName != ''
set @strSql = @strSql + 'and roleName = '''+@roleName+''''
if @userName != ''
set @strSql = @strSql + 'and userName = '''+@userName+''''
if @beginTime != ''
set @strSql = @strSql + 'and logTime > '''+@beginTime+''''
if @endTime != ''
set @strSql = @strSql + 'and logTime < '''+@endTime+''''

最后执行该SQL语句：exec(@strSql)
以下是源代码。

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

-- =============================================
-- Author: <op>
-- Create date: <2010-10-12>
-- Description: <根据各种条件复合查询日志>
-- =============================================
ALTER PROCEDURE [dbo].[sp_Log_QueryLog]
-- Add the parameters for the stored procedure here
@logName nvarchar(50),
@roleName nvarchar(50),
@userName nvarchar(50),
@beginTime nvarchar(50),
@endTime nvarchar(50)
AS
BEGIN
SET NOCOUNT ON;
declare @strSql nvarchar(200)
set @strSql = 'select logId as 日志编号,logName as 日志名称,roleName as 操作人角色,userName as 操作人名,logObj as 操作对象,beginState as 操作前, endState as 操作后,logNotes as 操作结果, logTime as 操作时间 from tb_Log where notes = '''' '
if @logName != ''
set @strSql = @strSql + 'and logName ='''+ @logName +''''
if @roleName != ''
set @strSql = @strSql + 'and roleName = '''+@roleName+''''
if @userName != ''
set @strSql = @strSql + 'and userName = '''+@userName+''''
if @beginTime != ''
set @strSql = @strSql + 'and logTime > '''+@beginTime+''''
if @endTime != ''
set @strSql = @strSql + 'and logTime < '''+@endTime+''''
print @strSql
exec(@strSql)

END

下面是一个修改密码的存储过程的小例子

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

-- =============================================
-- Author: <op>
-- Create date: <2010-10-11>
-- Description: <修改密码>
-- =============================================
ALTER PROCEDURE [dbo].[sp_XITONG_ChangePwd]
-- Add the parameters for the stored procedure here
@userName nvarchar(50),
@oldPwd nvarchar(50),
@newPwd nvarchar(50)
AS
BEGIN

declare @pwd nvarchar(50)
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

select @pwd = userPwd from tb_User where userName = @userName
-- Insert statements for procedure here
if @pwd = @oldPwd

Begin
update tb_User set userPwd = @newPwd where userName = @userName
if @@Error = 0
return 1-- 密码更新成功
else
return 0-- 密码更新失败
End

else
return 2-- 旧密码错误

END