POWER

Returns the value of the given expression to the specified power.

Syntax

POWER ( numeric_expression , y )

Arguments

numeric_expression

Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type.

y

Is the power to which to raise numeric_expression. y can be an expression of the exact numeric or approximate numeric data type category, except for the bit data type.

Return Types

Same as numeric_expression.

Examples

A. Use POWER to show results of 0.0

This example shows a floating point underflow that returns a result of 0.0.

SELECT POWER(2.0, -100.0)
GO

Here is the result set:

------------------------------------------
0.0

(1 row(s) affected)

B. Use POWER

This example returns POWER results for 21 to 24.

DECLARE @value int, @counter int
SET @value = 2
SET @counter = 1

WHILE @counter < 5
   BEGIN
      SELECT POWER(@value, @counter)
      SET NOCOUNT ON
      SET @counter = @counter + 1
      SET NOCOUNT OFF
   END
GO

Here is the result set:

----------- 
2           

(1 row(s) affected)

----------- 
4           

(1 row(s) affected)

----------- 
8           

(1 row(s) affected)

----------- 
16          

(1 row(s) affected)

See Also

decimal and numeric

float and real

int, smallint, and tinyint

Mathematical Functions

money and smallmoney