Math Numeric Functions MySQL Tutorial

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  4. FLOOR(X) returns the largest integer value not greater than X
mysql>
mysql> SELECT FLOOR(1.23);
+-------------+
| FLOOR(1.23) |
+-------------+
|           1 |
+-------------+
1 row in set (0.00 sec)
mysql> SELECT FLOOR(-1.23);
+--------------+
| FLOOR(-1.23) |
+--------------+
|           -2 |
+--------------+
1 row in set (0.02 sec)
mysql>