存储过程的拼接写法 -- 转载

USE [a]GO/****** Object:  StoredProcedure [a].[Processname]    Script Date: 02/24/2011 11:49:55 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGO-- =============================================-- Author:<Author,,Name>-- Create date: <Create Date,,>-- Description:<Description,,>-- =============================================CREATE PROCEDURE [a].[Processname]@FromDateTime varchar(200),@ToDateTime varchar(200),@CountryCode varchar(200),@Version varchar(200)ASdeclare @sql varchar(1000)set @sql='select AccessDateTime,IpAddress,Area,AreaDetail as description,City,Version from a.TableName where AccessDateTime between ''' + @FromDateTime+''' and '''+ @ToDateTime+''''BEGINif(@CountryCode='')beginset @sql=@sqlif(@Version='')beginset @sql = @sql +' order by id desc'endelsebeginset @sql = @sql + ' and  Version='''+@Version +'''  order by id desc'endendelse beginset @sql=@sqlif(@Version='')beginset @sql=@sql +' and  Area='''+@CountryCode+''' order by id desc'endelsebeginset @sql=@sql +' and Area='''+@CountryCode+''' and  Version='''+ @Version +''' order by id desc'endend--print @sqlexec(@sql)END