T-SQL POWER() Function

The T-SQL (Transact-SQL) POWER() function returns the base raise to the power of exponent. In special cases it returns the following:

• If the exponent is zero, then 1 is returned.

Syntax

POWER(base, exponent)

Parameters

Return Value

Returns the base raise to the power of exponent.

Example 1:

The example below shows the usage of POWER() function.

SELECT POWER(5, 2);
Result: 25

SELECT POWER(3, 5);
Result: 243

SELECT POWER(CAST(5.5 AS FLOAT), 2);
Result: 30.25

SELECT POWER(CAST(5.5 AS FLOAT), 2.1);
Result: 35.87250030349099

SELECT POWER(CAST(5 AS FLOAT), -1);
Result: 0.2

SELECT POWER(5, 0);
Result: 1

SELECT POWER(0, 5);
Result: 0

Example 2:

Consider a database table called Sample with the following records:

The statement given below can be used to calculate the square root of column x.

SELECT *, POWER(CAST(x AS FLOAT), 0.5) AS POWER_Value FROM Sample;

This will produce the result as shown below:

Example 3:

Consider a database table called Sample with the following records:

To calculate the records of column x raised to the power of records of column y, the following query can be used:

SELECT *, POWER(CAST(x AS FLOAT), y) AS POWER_Value FROM Sample;

This will produce the result as shown below: