删除sql SELECT中的所有非数字字符

Question

当我在 sql 中调用查询时，我想删除所有非数字字符。我有函数，在函数中我这样做：

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，但这不起作用

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

编辑 我有！ T-SQL 选择查询以删除非数字字符

它不能正常工作

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 并且在此查询之后我有 04532 但我需要 0453297

Answer 1

前段时间我使用下面的函数解决了这个问题

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')

请注意，它还会考虑字符°,¹,²,³数字，然后将其替换为 0,1,2,3。

我把它放在一个函数中，以便在我需要一次修复许多表中的许多列的场景中轻松重用它。

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

要不就

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

Obs：这不是最致命的方法，而是彻底的方法。

编辑

必须使用非 UDF 解决方案，REPLACE但由于 regex 在 SQL 中不是那么好，您可以结束做一些讨厌的事情，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