ATAN2( )

This MySQL function returns the arctangent, in radians, of X and Y for a point on a Cartesian plane.

Syntax

Below is the syntax for this command. Text within square brackets (i.e, [ and ] ) are optional. Choices are separated by bars (i.e, | ). Ellipses preceded by a comma indicates a repeating pattern. Ellipses before or after syntax are used to highlight a relevant except from the larger syntax. Text displayed in italic letters represent text that should be replaced with the specific names related to the database (e.g., column with the name of the column).

ATAN2(number, number)

Explanation

This function returns the arctangent, in radians, of X and Y for a point on a Cartesian plane. The value for Y is given as the first argument and X as the second. The reverse function is TAN( ).

Examples

SELECT ATAN2(10, 5);

+--------------+
| ATAN2(10, 5) |
+--------------+
|     1.107149 |
+--------------+