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SQL Server POWER() Function



The SQL Server (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

base Required. Specify the base of type float or of a type that can be implicitly converted to float.
exponent Required. Specify the exponent.

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:

Datax
Data 10.5
Data 21
Data 35
Data 410
Data 550

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:

DataxPOWER_Value
Data 10.50.7071067811865476
Data 211
Data 352.23606797749979
Data 4103.1622776601683795
Data 5507.0710678118654755

Example 3:

Consider a database table called Sample with the following records:

Dataxy
Data 10.52
Data 213
Data 354
Data 4103
Data 5503

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:

DataxyPOWER_Value
Data 10.520.25
Data 2131
Data 354625
Data 41031000
Data 5503125000

❮ SQL Server Functions