SQL Server FAQ - Mathematical Functions Supported by SQL Server 2005 By: FYIcenter.com (Continued from previous topic...) What Are the Mathematical Functions Supported by SQL Server 2005? SQL Server 2005 supports 23 mathematical functions: ABS, ACOS, ASIN, ATAN, ATN2, CEILING, COS, COT, DEGREES, EXP, FLOOR, LOG, LOG10, PI, POWER, RADIANS, RAND, ROUND, SIGN, SIN, SQRT, SQUARE, and TAN. The return data types of mathematical functions are determined by two rules: Arithmetical functions: ABS, CEILING, DEGREES, FLOOR, POWER, RADIANS, and SIGN are returning the same data type as the input values. No implicit data type conversions are performed. Other mathematical functions: COS, COT, EXP, LOG, LOG10, SIN, SQRT, SQUARE and TAN are taking only FLOAT data type as input and returning FLOAT data type. Implicit data type conversion will be performed if you are calling these functions with a non-FLOAT data type. The tutorial exercise gives you some good examples on how to use mathematical functions: -- ABS retuns the same data type as the input DECLARE @x FLOAT(53); DECLARE @y NUMERIC(9,2); DECLARE @z INT; SET @x = -12345.123456789E+20; SET @y = -12345.12; SET @z = -12345 SELECT ABS(@x); SELECT ABS(@y); SELECT ABS(@z); GO 1.2345123456789E+24 12345.12 12345 -- SQRT converts input to FLOAT(53) first DECLARE @x FLOAT(53); DECLARE @y NUMERIC(9,2); DECLARE @z INT; SET @x = 12345.123456789E+20; SET @y = 12345.12; SET @z = 12345 SELECT SQRT(@x); SELECT SQRT(@y); SELECT SQRT(@z); GO 1111086110829.8 111.108595527079 111.108055513541 (Continued on next topic...)
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