With the help of trunc (sysdate) between

Hello - I have a question about when to use trunc (sysdate).

In particular, I wonder whether or not there are no reason to use trunc (sysdate) in the following statement:
select app_id from app where sysdate between start_date and stop_date
.. .or start_date and stop_date are stored truncated (not stored in the column time info).

Thank you!

To some extent, it depends on you want to return. If you ran the query today, and the date of the judgment was 21-sep-2011, would you record back or not? If Yes, then you need to trunc sysdate, given that the component "hour" of stop_date's midnight, and it's almost always after midnight for sysdate (86 399 seconds per day). If this isn't the case, then it is not serious.

John

Tags: Database

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