;with cte (newvalue) as (select COALESCE etc FROM sometable)select case when newvalue < 0 then 0 else newvalue end as newvalue from cte

DECLARE @A INTEGER = NULL, @B INTEGER = -351, @C INTEGER = 45, @D INTEGER = 999;SELECT Calculation.result * ((SIGN(Calculation.result) + 1) / 2)FROM ( SELECT TOP (1) result = COALESCE(@A, @B, @C, @D) ORDER BY result) AS Calculation;

-- To make result = 0 when @test < 0declare @test int -7select (ABS(@test)+@test)/2 as result

select (ABS(@test)+@test)/2 as result

;with calc(result) as(select COALESCE(@A, @B, @C, @D)union allselect nullfrom calc where 1=0)select calc.result * ((sign(calc.result) + 1) / 2)from calc

select geometry::STGeomFromWKB(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