T-SQL trim   (dan karakter non-alfanumerik lainnya)

Ini akan menghapus semua karakter non alfanumerik

CREATE FUNCTION [dbo].[fnRemoveBadCharacter]
(
    @BadString nvarchar(20)
)
RETURNS nvarchar(20)
AS
BEGIN

            DECLARE @nPos INTEGER
            SELECT @nPos = PATINDEX('%[^a-zA-Z0-9_]%', @BadString)

            WHILE @nPos > 0
            BEGIN
                        SELECT @BadString = STUFF(@BadString, @nPos, 1, '')
                        SELECT @nPos = PATINDEX('%[^a-zA-Z0-9_]%', @BadString)
            END

            RETURN @BadString
END

Gunakan fungsi seperti:

UPDATE TableToUpdate
SET ColumnToUpdate = dbo.fnRemoveBadCharacter(ColumnToUpdate)
WHERE whatever