Question

我想在sql中调用查询时删除所有非数字字符。我有功能和功能我这样做：

Declare @KeepValues as varchar(50)
Set @KeepValues = '%[^0-9]%'
While PatIndex(@KeepValues, @Temp) > 0
    Set @Temp = Stuff(@Temp, PatIndex(@KeepValues, @Temp), 1, '')

但现在我想用查询（选择）来做。我试过了，但这不能工作

select substring(AdrTelefon1, PatIndex('%[^0-9]%', AdrTelefon1), 2000) from test

修改我有它！ T-SQL select query to remove non-numeric characters

无法正常使用

SELECT LEFT(SUBSTRING(AdrTelefon1, PATINDEX('%[0-9]%', AdrTelefon1), 8000),
       PATINDEX('%[^0-9]%', SUBSTRING(AdrTelefon1, PATINDEX('%[0-9]%', AdrTelefon1), 8000) + 'X') -1) from test

我有04532/97并且在此查询后我有04532但是我需要0453297

Answer 1

前段时间我使用以下功能解决了这个问题

create function dbo.[fnrReplacetor](@strtext varchar(2000))
returns varchar(2000)
as
begin
    declare @i int = 32, @rplc varchar(1) = '';
    while @i < 256
    begin
        if (@i < 48 or @i > 57) and CHARINDEX(char(@i),@strtext) > 0
        begin
            --° #176 ~ 0   --¹ #185 ~ 1   --² #178 ~ 2   --³ #179 ~ 3
            set @rplc = case @i
            when 176 then '0'
            when 185 then '1'
            when 178 then '2'
            when 179 then '3'
            else '' end;

            set @strtext = REPLACE(@strtext,CHAR(@i),@rplc);
        end

        set @i = @i + 1;
    end
    return @strtext;
end

GO

select dbo.[fnrReplacetor]('12345/97')

注意它也会考虑字符°，¹，²，³数字，然后用0,1,2,3替换。

我把它放在一个函数中，以便在我的场景中重新使用它，我需要一次修复许多表中的许多列。

update t
set t.myColumn = dbo.[fnrReplacetor](tempdb.myColumn)
 from test t
 where tempdb.myColumn is not null

或只是

select dbo.[fnrReplacetor](tempdb.myColumn) as [Only Digits]
 from test t
where tempdb.myColumn is not null

Obs：这不是最彻底的方法。

修改

非UDF解决方案必须使用REPLACE，但由于正则表达式在SQL中不是那么好，所以你可以结束一些讨厌的事情，如下例所示：

declare @test as table (myColumn varchar(50)) insert into @test values ('123/45'),('123-4.5') Select replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(myColumn,'a',''),'b',''),'c',''),'d',''),'e',''),'f',''),'g',''),'h',''),'i',''),'j',''),'k',''),'l',''),'m',''),'n',''),'o',''),'p',''),'q',''),'r',''),'s',''),'t',''),'u',''),'v',''),'w',''),'x',''),'y',''),'z',''),'A',''),'B',''),'C',''),'D',''),'E',''),'F',''),'G',''),'H',''),'I',''),'J',''),'K',''),'L',''),'M',''),'N',''),'O',''),'P',''),'Q',''),'R',''),'S',''),'T',''),'U',''),'V',''),'W',''),'X',''),'Y',''),'Z',''),'.',''),'-',''),'/','') from @test

删除sql SELECT中的所有非数字字符

1 个答案: