 
USE [Fly] 
GO 
--參數(shù)：@inStr 待搜索字串，@fndStr 搜索字串，@doc 分隔符 
-- 例：select dbo.fSearch('1,2,3,4,5,6','3,6,5,8,2',',') 返回0-不匹配，返回1-匹配(@instr中有@fndStr內(nèi)容) 
--可以用于表搜索，如： 
-- Select *,dbo.fSearch(str,'3,6,5,8,2',',') as 是否匹配 from 表名 
-- @fndStr和@doc兩個(gè)參數(shù)就需要你自己提供了，@inStr可以是數(shù)據(jù)表里的某個(gè)待搜索字段名 
CREATE FUNCTION CGF_FN_Search(@inStr VARCHAR(500),@fndStr VARCHAR(500),@doc VARCHAR(5)) 
RETURNS INT 
AS 
BEGIN 
DECLARE @i INT,@c VARCHAR(500),@fStr VARCHAR(500) 
SET @fStr = @fndStr 
WHILE(LEN(@fStr) > 0) 
BEGIN 
SET @i = Charindex(@doc, @fStr) 
IF(@i = 0) 
BEGIN 
IF(CHARINDEX(@fStr,@inStr) > 0) 
RETURN 1 
ELSE 
RETURN 0 
END 
ELSE 
BEGIN 
SET @c = SUBSTRING(@fStr,1,@i-1) 
IF(CHARINDEX(@c,@inStr) > 0) 
RETURN 1 
ELSE 
SET @fStr = SUBSTRING(@fStr,@i+LEN(@doc),LEN(@fStr)) 
END 
END 
RETURN 0 
END 

版本二：逐字進(jìn)行比較
算法思路：逐字截取搜索字符串循環(huán)與待搜索字符進(jìn)行比較

復(fù)制代碼代碼如下:

 
USE [Fly] 
GO 
/****** Object: UserDefinedFunction [dbo].[CGF_FN_SearchChar] Script Date: 09/03/2010 16:42:12 ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE FUNCTION [dbo].[CGF_FN_SearchChar](@inStr VARCHAR(500),@fndStr VARCHAR(500)) 
RETURNS INT 
AS 
BEGIN 
DECLARE @i INT,@f INT,@c VARCHAR(1) 
SET @i = 1 
SET @f = LEN(@fndStr) 
WHILE(@i <= @f) 
BEGIN 
SET @c = SUBSTRING(@fndStr, @i, @i) 
IF(CHARINDEX(@c,@inStr) > 0) 
BEGIN 
RETURN 1 
END 
SET @i = @i + 1 
END 
RETURN 0 
END 