>I guess I found it
>
>REPLACE time_table.startime WITH CTOT("01/01/2009 13:35")
>REPLACE time_table.endtime WITH CTOT("01/01/2009 13:36")

Depends on what date & time you are storing. Where is the data coming from? What is the meaning of the datetime you are storing? I use a default datetime() in the table definition to keep the time the record was created. If you want to store the time it was edited that's a bit more complex because the act of storing the time is itself an edit.