POWER (SSIS Expression)
Applies to: 
SQL Server
SSIS Integration Runtime in Azure Data Factory
Returns the result of raising a numeric expression to a power. The power parameter must evaluate to an integer.
Syntax
POWER(numeric_expression,power)
Arguments
numeric_expression
Is a valid numeric expression.
power
Is a valid numeric expression.
Result Types
DT_R8
Remarks
The numeric_expression and power arguments are cast to the DT_R8 data type before the power is computed. For more information, see Integration Services Data Types.
If numeric_expression evaluates to zero and power is negative, the expression evaluator returns an error and sets the return result to null.
If numeric_expression or power evaluate to indeterminate results, the return result is null.
The power argument can be a fraction. For example, you can use the value 0.5 as the power.
Expression Examples
This example uses a numeric literal. The function raises 4 to the power of 3 and returns 64.
POWER(4,3)
This example uses the Length column and the DimensionCount variable. If Length is 8, and DimensionCount is 2, the return result is 64.
POWER(Length, @DimensionCount)