关于多条件查询模糊

create procedure [dbo].[Get_Twzzl]
(
@startIndex int,
@endIndex int,
@docount bit,
@w_jgid char(50),
@lbbh char(50),
@w_wzbm char(50),
@w_wzmc char(50),
@w_ggxh char(50)
)
as
set nocount on
set @lbbh=ltrim(rtrim(@lbbh))
set @w_wzbm=ltrim(rtrim(@w_wzbm))
set @w_wzmc=ltrim(rtrim(@w_wzmc))
set @w_ggxh=ltrim(rtrim(@w_ggxh))
declare @p as varchar(500)
set @p=''
    set @p=@p+' w_jgid='''+@w_jgid+''' '
    if(@lbbh<>'')
    begin
        set @p=@p+' and left(w_wzbm,len('''+@lbbh+'''))='''+@lbbh+''' '
    end
    if(@w_wzbm<>'')
    begin
        set @p=@p+' and w_wzbm='''+@w_wzbm+''' '
    end
    if(@w_wzmc<>'')
    begin
        set @p=@p+' and w_wzmc='''+@w_wzmc+''' '
    end
    if(@w_ggxh<>'')
    begin
        set @p=@p+' and w_ggxh='''+@w_ggxh+''' '
    end
    declare @sqlstr as varchar(8000)
    declare @sqlstr1 as varchar(8000)
    declare @sqlstr2 as varchar(8000)
    set @sqlstr='select count(*) AS Counts from Twzzl where '+@p+''
if(@docount=1)
    exec(@sqlstr)
else
begin
    create table #indextable (w_autoid int identity(1,1),nid int)
    set rowcount #indextable
set sqlstr1='insert into #endIndex(nid) select w_autoid from Twzzl where '+@p+' order by w_autoid desc;'
set sqlstr2='select O.w_autoid,O.w_wzbm,O.w_wzmc,O.w_ggxh,O.w_jldw,O.w_disable,O.w_jgid,O.w_xhbh,rtrim(ltrim(str(O.w_jhprice,20,2))) as w_jhprice from Twzzl O,#indextable t where '+@p+' and O.w_autoid=t.nid
and t.w_autoid between '+ltrim(@startIndex)+' and '+ltrim(@endIndex)+' order by t.w_autoid desc'
exec(@sqlstr1+@sqlstr2)
end
set nocount off
go