POWER
Purpose
Returns base_value raised to the power of exponent_value.
Syntax
where:
|
Syntax element … |
Specifies … |
|
SYSLIB |
the name of the database where the function is located. |
|
base_value |
a numeric argument. If base_value is negative, exponent_value must be an integer. If any input argument is NULL, the function returns NULL. |
|
exponent_value |
a numeric argument. |
ANSI Compliance
This is a Teradata extension to the ANSI SQL:2011 standard.
Invocation
POWER is an embedded services system function. For information on activating and invoking embedded services functions, see “Embedded Services System Functions” on page 24.
Argument Types and Rules
Expressions passed to this function must have one of the following data types:
BYTEINT, SMALLINT, INTEGER, BIGINT, DECIMAL/NUMERIC, FLOAT/REAL/DOUBLE PRECISION, or NUMBER
Result Type
If either of the input arguments is a FLOAT type, the result data type is FLOAT. Otherwise, the result data type is NUMBER.
For information on the default data type format for NUMBER or FLOAT, see SQL Data Types and Literals.
Example
The following query returns the result 8.0.
SELECT POWER(2, 3);
Example
The following query returns the result 0.125.
SELECT POWER(2, -3);
Example
The following query returns the result 10.648.
SELECT POWER(2.2, 3);
Example
The following query returns an error because the base value is negative and the exponent value is not an integer.
SELECT POWER(-2.2, 3.1);