In the example given the logic is the same with and without the trunc the execution plan likely won't be if there is an idex on the column and the query is fairly selective (which I doubt) . On 4 May 2011 14:33, <TESTAJ3@xxxxxxxxxxxxxx> wrote: to truncate the time component? Joe _______________________________________ Joe Testa, Oracle Certified Professional Senior Engineering & Administration Lead (Work) 614-677-1668 (Cell) 614-312-6715 From: Paul Drake <bdbafh@xxxxxxxxx> To: tomdaytwo@xxxxxxxxx Cc: oracle-l <oracle-l@xxxxxxxxxxxxx> Date: 05/04/2011 09:23 AM Subject: Re: Just as a learning exercise Sent by: oracle-l-bounce@xxxxxxxxxxxxx ------------------------------ Thomas, Why would anyone ever apply a TRUNC ( ) function to a date column in a where clause? Is...