Categories:
Numeric Functions (Exponent and Root)

SQUARE

Returns the square of a numeric expression, i.e. a numeric expression multiplied by itself.

Syntax

SQUARE(expr)

Usage Notes

  • Always returns a floating point number, even if the input expression is of an integer type.
  • More efficient than the expression x*x, so square(x) is preferred when a floating-point result is acceptable.

Examples

SELECT column1, square(column1)
FROM (values (0), (1), (-2), (3.15), (null)) v;

---------+-----------------+
 column1 | square(column1) |
---------+-----------------+
 0       | 0               |
 1       | 1               |
 -2      | 4               |
 3.15    | 9.9225          |
 [NULL]  | [NULL]          |
---------+-----------------+