Mathematical Functions (Transact-SQL)

 

APPLIES TO: SQL Server Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse

The following scalar functions perform a calculation, usually based on input values that are provided as arguments, and return a numeric value:

ABS	DEGREES	RAND
ACOS	EXP	ROUND
ASIN	FLOOR	SIGN
ATAN	LOG	SIN
ATN2	LOG10	SQRT
CEILING	PI	SQUARE
COS	POWER	TAN
COT	RADIANS

 Note

Arithmetic functions, such as ABS, CEILING, DEGREES, FLOOR, POWER, RADIANS, and SIGN, return a value having the same data type as the input value. Trigonometric and other functions, including EXP, LOG, LOG10, SQUARE, and SQRT, cast their input values to float and return a float value.

All mathematical functions, except for RAND, are deterministic functions. This means they return the same results each time they are called with a specific set of input values. RAND is deterministic only when a seed parameter is specified. For more information about function determinism, see Deterministic and Nondeterministic Functions.