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sql 存储过程参数为空则不作为条件
/****** Object: StoredProcedure [dbo].[GetCommonGroupByRegion] Script Date: 03/23/2017 17:31:18 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOALTER proc [dbo].[GetCommonGroupByRegion]@CarCategory varchar(50)=null,---车型@CreateTimeStart datetime=null, --入会开始时间@CreateTimeEnd datetime=null, --入会结束时间@AuthenticationTimeStart datetime=null, --认证开始时间@AuthenticationTimeEnd datetime=null, --认证结束时间@BuyTimeStart datetime=null, --购车开始时间@BuyTimeEnd datetime=null --购车结束时间asbeginDECLARE @strPC VARCHAR(2000), @strAPP VARCHAR(2000), @strWX VARCHAR(2000), @strWAP VARCHAR(2000)---------------------pc startSET @strPC = ( SELECT DISTINCT STUFF( ( SELECT ‘,‘‘‘+ qudao+‘‘‘‘ FROM CreatedType WITH ( NOLOCK ) WHERE qtype = ‘pc‘ ORDER BY qudao FOR XML PATH(‘‘)), 1,4, ‘‘) AS jzhw FROM CreatedType t) set @strPC= left(@strPC,len(@strPC)-1)-------------------------pc end***********------------------------app startSET @strAPP = ( SELECT DISTINCT STUFF( ( SELECT ‘,‘‘‘+ qudao+‘‘‘‘ FROM CreatedType WITH ( NOLOCK ) WHERE qtype = ‘app‘ ORDER BY qudao FOR XML PATH(‘‘)), 1,4, ‘‘) AS jzhw FROM CreatedType t) set @strAPP= left(@strAPP,len(@strAPP)-1)------------------------- app end *******------------------------wx startSET @strWX = ( SELECT DISTINCT STUFF( ( SELECT ‘,‘‘‘+ qudao+‘‘‘‘ FROM CreatedType WITH ( NOLOCK ) WHERE qtype = ‘wx‘ ORDER BY qudao FOR XML PATH(‘‘)), 1,4, ‘‘) AS jzhw FROM CreatedType t) set @strWX= left(@strWX,len(@strWX)-1)------------------------- wx end *******------------------------wap startSET @strWAP = ( SELECT DISTINCT STUFF( ( SELECT ‘,‘‘‘+ qudao+‘‘‘‘ FROM CreatedType WITH ( NOLOCK ) WHERE qtype = ‘wap‘ ORDER BY qudao FOR XML PATH(‘‘)), 1,4, ‘‘) AS jzhw FROM CreatedType t) set @strWAP= left(@strWAP,len(@strWAP)-1)------------------------- wap end ******* select c.CarCategory as ‘车型‘, d.Region as ‘区域‘, COUNT(case when a.CreatedPerson like ‘%D%‘ and len(a.CreatedPerson)=5 then a.Id else null end ) as ‘经销商‘, COUNT(case when a.CreatedPerson in( @strPC) then a.Id else null end ) as ‘网站‘, COUNT(case when a.CreatedPerson in(@strAPP) then a.Id else null end ) as ‘APP‘, COUNT(case when a.CreatedPerson in(@strWX) then a.Id else null end ) as ‘微信‘, COUNT(case when a.CreatedPerson in( @strWAP) then a.Id else null end ) as ‘wap‘ from Membership a left join IF_Customer b on a.IdentityNumber=b.IdentityNumber left join IF_Car c on b.CustId=c.CustId left join CS_CarDealerShip d on c.DealerId=d.DealerId where a.IsDel=0 --case when @CreateTimeStart is not null then and a.CreateTime>@CreateTimeStart else null end --and ( (@CreateTimeStart is not null and @CreateTimeStart!=‘‘) and (a.CreateTime>@CreateTimeStart) ) --and ( (@CreateTimeEnd is not null and @CreateTimeEnd!=‘‘) and (a.CreateTime<=@CreateTimeEnd) ) and (a.CreateTime>=@CreateTimeStart or @CreateTimeStart is null) and (a.CreateTime<=@CreateTimeEnd or @CreateTimeEnd is null) --and ( (@AuthenticationTimeStart is not null and @AuthenticationTimeStart!=‘‘) and (a.AuthenticationTime>@AuthenticationTimeStart) ) --and ( (@AuthenticationTimeEnd is not null and @AuthenticationTimeEnd!=‘‘) and (a.AuthenticationTime<=@AuthenticationTimeEnd) ) and (a.AuthenticationTime>=@AuthenticationTimeStart or @AuthenticationTimeStart is null) and (a.AuthenticationTime<=@AuthenticationTimeEnd or @AuthenticationTimeEnd is null) --and ( (@CarCategory is not null and @CarCategory!=‘‘) and (c.CarCategory=@CarCategory) ) and (c.CarCategory=@CarCategory or @CarCategory is null ) --and ( (@BuyTimeStart is not null and @BuyTimeStart!=‘‘) and ( c.BuyTime>@BuyTimeStart) ) --and ( (@BuyTimeEnd is not null and @BuyTimeEnd!=‘‘) and ( c.BuyTime<=@BuyTimeEnd) ) and (c.BuyTime>=@BuyTimeStart or @BuyTimeStart is null) and (c.BuyTime<=@BuyTimeEnd or @BuyTimeEnd is null) and d.Region<>‘‘ and d.Region<>‘-‘ group by c.CarCategory, d.Region ; end
解析: and (c.BuyTime<=@BuyTimeEnd or @BuyTimeEnd is null)
首先 and 条件后面是括号,那就说明括号 是一个整体, 括号里面 用的 or 语法,也就说明只要任意一个条件满足就ok, 当参数为空的时候,假如作为条件的字段是时间格式的,如果做大小比较肯定会失败,这个时候后面的 or的条件满足了,就把前面的给忽略了,其实这个时候就相当于 and 1=1 了,
sql 存储过程参数为空则不作为条件
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