Best Practice Question for Date Compares

Hello,
I'm far from an expert on Oracle and PL/SQL, so I may have this all wrong. I'm working on some selection scripts, and the guy that wrote these before me likes to convert parts of dates to numbers in order to do a compare. It seems to me a trunc(date, part) would be much more efficient. Can anyone confirm my thoughts here?
I'm seeing this a lot:
AND TO_NUMBER (TO_CHAR (scheduleddate, 'YYYY')) = TO_NUMBER (TO_CHAR (SYSDATE - 1, 'YYYY'))
Seems to me that I'd be better off just doing:
trunc(scheduleddate, 'YEAR') = trunc(SysDate, 'YEAR').
Does that make sense?
Thanks!
Chad

CSchrieber wrote:
Hello,
I'm far from an expert on Oracle and PL/SQL, so I may have this all wrong. I'm working on some selection scripts, and the guy that wrote these before me likes to convert parts of dates to numbers in order to do a compare. It seems to me a trunc(date, part) would be much more efficient. Can anyone confirm my thoughts here?
I'm seeing this a lot:
AND TO_NUMBER (TO_CHAR (scheduleddate, 'YYYY')) = TO_NUMBER (TO_CHAR (SYSDATE - 1, 'YYYY'))
Seems to me that I'd be better off just doing:
trunc(scheduleddate, 'YEAR') = trunc(SysDate, 'YEAR').
Does that make sense?
Thanks!
Chad
however , you might want to play around with it a bit to confirm you get the behavior you want in your context. I've not had much reason to use trunc, and in testing a few things just now to reply to admin1, I got some results that surprised me. Another little learning project for me now.
But I stand behind the essence of my original reply. The guy that wrote your original code was jumping through too many hoops (transform functions).

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Oracle Asset (Functional) Practice Questions for Interviews and Certificati

https://www.createspace.com/3495382
List Price: $29.99
Add to Cart
Oracle Asset (Functional) Practice Questions for Interviews and Certification Examination (Release 11i and 12)
Functional Consultant
Authored by Erp Gold
This book contains 150 Oracle Asset Practice Questions for functional consultants. Very useful for interviews and certification examinations.
Publication Date:
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94
Binding Type:
US Trade Paper
Trim Size:
6" x 9"
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