SELECT ini_Rate.tUpdate from ini_Rate where ini_Rate.tUpdate > ini_Rate.tEnter limit 1;
+---------------------+
| tUpdate             |
+---------------------+
| 2006-11-25 05:52:08 |
+---------------------+


SELECT unix_timestamp(ini_Rate.tUpdate) from ini_Rate where ini_Rate.tUpdate > ini_Rate.tEnter limit 1;
+-----------------------------------------+
| unix_timestamp(ini_Rate.tUpdate)        |
+-----------------------------------------+
|                              1164414128 |
+-----------------------------------------+