SQRT: get Square root of a number

mysql> SELECT SQRT(25);
+----------+
| SQRT(25) |
+----------+
|        5 |
+----------+
1 row in set (0.00 sec)

mysql> SELECT SQRT(125);
+--------------------+
| SQRT(125)          |
+--------------------+
| 11.180339887498949 |
+--------------------+
1 row in set (0.00 sec)

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