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square

Description​

Calculates the square of a value.

Syntax​

square(arg)

Parameters​

arg: the value whose square you want to calculate. You can specify only a numeric value. This function converts the numeric value into a DOUBLE value before it calculates the square of the value.

Return value​

Returns a value of the DOUBLE data type.

Usage notes​

If you specify a non-numeric value, this function returns NULL.

Examples​

Example 1: Calculate the square of a numeric value.

mysql>  select square(11);
+------------+
| square(11) |
+------------+
|        121 |
+------------+

Example 2: Calculate the square of a non-numeric value. The return value is NULL.

mysql>  select square('2021-01-01');
+----------------------+
| square('2021-01-01') |
+----------------------+
|                 NULL |
+----------------------+