Date Time Functions MySQL Tutorial

mysql>
mysql> select DATE_SUB(curdate(), INTERVAL 1.1 DAY_MICROSECOND);
+---------------------------------------------------+
| DATE_SUB(curdate(), INTERVAL 1.1 DAY_MICROSECOND) |
+---------------------------------------------------+
| 2007-07-21 23:59:58.999999                        |
+---------------------------------------------------+
1 row in set (0.00 sec)
mysql>