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mysql中取字符串中的数字的语句

WBOY
Release: 2016-06-07 18:06:57
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在很多时间我们需要把字符串的数字给取出来,通常大家会用php,asp等这类来操作,本文章介绍了在sql中取字符中的数字办法,有需要的朋友可以参考一下

代码如下:
one:
declare @s varchar(20)
declare @i varchar(20)
set @i=''
set @s='新会员必须购买350元产品'
while PATINDEX ('%[0-9]%', @s)>0
begin
set @i=@i+substring(@s,PATINDEX ('%[0-9]%', @s),1)
set @s=stuff(@s,1,PATINDEX ('%[0-9]%', @s),'')
end
select @i
--
300
two:
declare @a table(id int identity(1,1),a varchar(100))
insert @a select '新会员必须购买350元产品'
union all select '新店首次定货必须满20000元'

select left(right(a,len(a)-patindex('%[0-9]%',a)+1),len(right(a,len(a)-patindex('%[0-9]%',a)+1))-1) from @a

上在的

select substring(所查询字符串,patindex('%[^0-9][0-9]%',所查询字符串)+1,patindex('%[0-9][^0-9]%',所查询字符串)-patindex('%[^0-9][0-9]%',所查询字符串)) 这个只能查询第一次在字符串出现的数字串

那么如果出现字符串什么样子的呢 sss8989sss http://www.jb51.net ss8989ss8989ss8989 7879aafds789 432432432543534 应该怎么取呢


实例
代码如下:
create function fn_GetNum(@s varchar(8000))
returns varchar(8000)
as
begin
select @s = stuff(stuff(@s, 1, patindex('%[0-9, .]%', @s) - 1, ''),
patindex('%[^0-9, .]%', stuff(@s, 1, patindex('%[0-9, .]%', @s) - 1, '')),
len(@s), '')
return @s
end

declare @t table(s varchar(8000))
insert @t select 'aaa11112bbb'
union all select 'ccc212sss'
union all select 'sss21a'
select dbo.fn_GetNum(s) as result from @t

select substring(s,patindex('%[^0-9][0-9]%',s)+1,patindex('%[0-9][^0-9]%',s)-patindex('%[^0-9][0-9]%',s)) from @t

/*功能:获取字符串中的字母*/
CREATE FUNCTION dbo.F_Get_STR (@S VARCHAR(100))
RETURNS VARCHAR(100)
AS
BEGIN
WHILE PATINDEX('%[^a-z]%',@S)>0
BEGIN
set @s=stuff(@s,patindex('%[^a-z]%',@s),1,'')
END
RETURN @S
END
GO
--测试
select dbo.F_Get_STR('测试ABC123ABC')
GO
/*
功能:获取字符串中的数字
*/
create function dbo.F_Get_Number (@S varchar(100))
returns int
AS
begin
while PATINDEX('%[^0-9]%',@S)>0
begin
set @s=stuff(@s,patindex('%[^0-9]%',@s),1,'')
end
return cast(@S as int)
end
--测试
---select dbo.F_Get_Number('测试AB3C123AB5C')
GO


这样之后不管你是那种组合我们都可以方便的把字符中的数字全部取出来。
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