Question

我在sql server 2008中有一个表，其中一列包含字符串和特殊字符的字段 ABC;＃34; PQR。现在我想要一个函数从该字段中删除特殊字符和数字;因此输出将类似于abcpqr。

Answer 1

试试这个

DECLARE @str VARCHAR(400)
    DECLARE @expres  VARCHAR(50) = '%[~,@,#,$,%,&,*,(,),.,!,0-9]%'
      SET @str = '(remove) ~special~ 10 *characters. 3 5 from string 1 in sql!'
      WHILE PATINDEX( @expres, @str ) > 0
          SET @str = Replace(REPLACE( @str, SUBSTRING( @str, PATINDEX( @expres, @str ), 1 ),''),'-',' ')

      SELECT @str

REFERENCE

Answer 2

使用以下功能

/*********************************
Removes any characters from 
@myString that do not meet the 
provided criteria.
*********************************/
CREATE FUNCTION dbo.GetCharacters(@myString varchar(500), @validChars varchar(100))
RETURNS varchar(500) AS
BEGIN

While @myString like '%[^' + @validChars + ']%'
Select @myString = replace(@myString,substring(@myString,patindex('%[^' + @validChars + ']%',@myString),1),'')

Return @myString
END
Go

Declare @testStr varchar(1000),
@i int

Set @i = 1
while @i < 255
Select 
@TestStr = isnull(@TestStr,'') + isnull(char(@i),''), 
@i = @i + 1

Select @TestStr
Select dbo.GetCharacters(@TestStr,'a-z')
Select dbo.GetCharacters(@TestStr,'0-9')
Select dbo.GetCharacters(@TestStr,'0-9a-z')
Select dbo.GetCharacters(@TestStr,'02468bferlki')

Answer 3

试试这个： -

DECLARE @var varchar(255) = 'abc;#34;pqr';

SELECT
CONVERT(varchar(255),( 
    SELECT CASE 
           WHEN ( ASCII(UPPER(SUBSTRING(@var, Number, 1)))  BETWEEN  65 and 90  )
           THEN SUBSTRING(@var, Number, 1)
           END
    FROM
    ( 
       Select top(255) number FROM [master]..spt_values
       where type = 'p'
    ) AS n
    WHERE Number <= LEN(@var)
    FOR XML PATH(''))) as Result

结果

abcpqr

删除sql表字段中的特殊字符和数字

3 个答案: