SQL Server TRIM character

Question

I have the following string: \'BOB*\', how do I trim the * so it shows up as \'BOB\'

I tried the RTRIM(\'BOB*\',\'*\') but does not work as says needs only 1 paramet

Answer 1

CREATE FUNCTION dbo.TrimCharacter
(
    @Value NVARCHAR(4000),
    @CharacterToTrim NVARCHAR(1)
)
RETURNS NVARCHAR(4000)
AS
BEGIN
    SET @Value = LTRIM(RTRIM(@Value))
    SET @Value = REVERSE(SUBSTRING(@Value, PATINDEX('%[^'+@CharacterToTrim+']%', @Value), LEN(@Value)))
    SET @Value = REVERSE(SUBSTRING(@Value, PATINDEX('%[^'+@CharacterToTrim+']%', @Value), LEN(@Value)))
    RETURN @Value
END
GO
--- Example
----- SELECT dbo.TrimCharacter('***BOB*********', '*')
----- returns 'BOB'