【叶子函数分享二十一】检查给定串是否存在于由区间及点集的结合内

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-- Author: happyflystone

-- Date:2009-07-20

-- Parameter: @CardString

-- 被查询的串，形如：-13300001234,13300002230,13300002300

-- @CardNo 要查询的串

-- Return : int 0 -- 不存在于搜索串的范围内

-- 1 -- 存在于

-- 转载请注明出处。更多请访问：http://blog.youkuaiyun.com/happyflystone

-- 原帖地址：http://blog.youkuaiyun.com/happyflystone/archive/2009/07/21/4365264.aspx

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--创建函数

Create function IsInCardString(@CardString varchar(8000),@CardNo varchar(11))

returns int

as

begin

declare @temp table(a varchar(200))

declare @i int

set @CardString = rtrim(ltrim(@CardString))+','

set @i = charindex(',', @CardString)

while @i >= 1

begin

insert @temp values(left(@CardString, @i - 1))

set @CardString = substring(@CardString, @i + 1, len(@CardString) - @i)

set @i = charindex(',', @CardString)

end

if exists(select 1

from (

select case when charindex('-',a) > 0 then left(a,11) else a end as s,

case when charindex('-',a) > 0 then right(a,11) else a end as e

from @temp

) a

where @CardNo between s and e)

set @i= 1

else

set @i= 0

return @i

end

go

--测试示例

declare @CardString varchar(1000)

set @CardString ='13300000000-13300001234,13300002230,13300002300,13300002302,13300004101-13300004204,13300004212,13300004310'

declare @CardNo varchar(1000)

set @CardNo = '13300000001' --存在

select dbo.IsInCardString(@CardString,@CardNo) as result1

set @CardNo = '13300001235' --不存在

select dbo.IsInCardString(@CardString,@CardNo) as result2

--运行结果

/*

result1

-----------

1

result2

-----------

0

*/