ISNUMERIC basic
JavaScript
DECLARE @test AS TABLE
(
[Val] NVARCHAR(255)
);
INSERT INTO @test VALUES ('123');
INSERT INTO @test VALUES ('123.456');
INSERT INTO @test VALUES ('123,456');
INSERT INTO @test VALUES ('2014.10.21');
INSERT INTO @test VALUES ('0xAB');
INSERT INTO @test VALUES ('');
SELECT
[Val]
,[isNumeric] = ISNUMERIC(Val)
FROM @test tb;