Remove Alpha letter from string at the end

If the last letter from a string is Alpha then remove it otherwise return the string as it is.


 DECLARE @STR nvarchar(200) = '1641746A'


if ISNUMERIC(RIGHT(@STR,1))=0

begin

SET @STR = SUBSTRING(@STR, 1, (LEN(@STR) - 1))

SELECT @STR

END

ELSE

SELECT @STR

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