sql 动态修改查询条件

 1 set ANSI_NULLS ON
 2 set QUOTED_IDENTIFIER ON
 3 go
 4 
 5 
 6 --============================================
 7 --Author:Jianwen Sha
 8 --Created Date:2010年11月8日
 9 --Description:******
10 --============================================
11 ALTER PROC [dbo].[******]
12 @str varchar(500)--搜索条件
13 AS 
14 BEGIN 
15     DECLARE @strwhere varchar(2000)
16     SET @strwhere='SELECT ****** FROM  ******  WHERE ****** BETWEEN '''
17     +  convert(varchar(20),@st,120)
18     +''' and  '''
19     +convert(varchar(20),@et,120)+''''+@str
20         
21     SET @strwhere=@strwhere+' AND ******='+ ltrim(******)
22 
23     EXEC (@strwhere)
24 END 
25         

思路:拼接查询字符串