sign

Description

Returns the sign of x. A negative number, 0, or a positive number as input corresponds to -1, 0, or 1 as output, respectively.

Syntax

SIGN(x);

Parameters

x: supports the DOUBLE data type.

Return value

Returns a value of the FLOAT data type.

Examples

mysql> select sign(3.14159);
+---------------+
| sign(3.14159) |
+---------------+
|             1 |
+---------------+
1 row in set (0.02 sec)