DEGREES(X) returns the argument X, converted from radians to degrees : DEGREES « Math Numeric Functions « MySQL Tutorial

1. MySQL Tutorial
2. Math Numeric Functions
3. DEGREES

mysql>
mysql> SELECT DEGREES(PI());
+---------------+
| DEGREES(PI()) |
+---------------+
|           180 |
+---------------+
1 row in set (0.00 sec)

mysql>
mysql> SELECT DEGREES(PI() / 2);
+-------------------+
| DEGREES(PI() / 2) |
+-------------------+
|                90 |
+-------------------+
1 row in set (0.00 sec)

mysql>