How to use a TRIM function in SQL Server

Question

I cannot get this TRIM code to work

SELECT 
   dbo.COL_V_Cost_GEMS_Detail.TNG_SYS_NR AS [EHP Code], 
   dbo.COL_TBL_VCOURSE.TNG_NA AS [Course Title], 
   LTR         


        

Answer 1

Example:

DECLARE @Str NVARCHAR(MAX) = N'
            foo   bar
        Foo           Bar        

'

PRINT '[' + @Str + ']'

DECLARE @StrPrv NVARCHAR(MAX) = N''

WHILE ((@StrPrv <> @Str) AND (@Str IS NOT NULL)) BEGIN
    SET @StrPrv = @Str

    -- Beginning
    IF EXISTS (SELECT 1 WHERE @Str LIKE '[' + CHAR(13) + CHAR(10) + CHAR(9) + ']%')
        SET @Str = LTRIM(RIGHT(@Str, LEN(@Str) - 1))

    -- Ending
    IF EXISTS (SELECT 1 WHERE @Str LIKE '%[' + CHAR(13) + CHAR(10) + CHAR(9) + ']')
        SET @Str = RTRIM(LEFT(@Str, LEN(@Str) - 1))
END

PRINT '[' + @Str + ']'

Result

[
            foo   bar
        Foo           Bar        

]
[foo   bar
        Foo           Bar]

Using fnTrim

Source: https://github.com/reduardo7/fnTrim

SELECT dbo.fnTrim(colName)