Solved

Oracle Date comparison by concatenating 2 fields

Posted on 2007-04-10
4
785 Views
Last Modified: 2013-12-19
Hi

I am trying to do a date comparison in an SQL select statement on Oracle 9i.  The problem in this particular case is that the date is stored in a field only containing the date and the time is stored in a field with a zero  date e.g. "00/00/00 12:01:01".

This is basically what I am trying to do:
...
AND G16.DESPDATE         >= to_date('27/03/2007 17:00','DD/MM/YYYY HH24:MI')  
AND G16.DESPDATE         <= to_date('28/03/2007 23:45','DD/MM/YYYY HH24:MI')  
...

G16.DESPDATE as I said contains only the date
G16.DESPTIME however contains the zero date AND the time value.


Does anyone know how I can go about concatenating the 2 fields to do this comparison?

Any help would be massively appreciated, I have already spent AGES on this!
0
Comment
Question by:wheelibin
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 18883991
what data type are the 2 fields DEPDATE and DESPTIME ?
0
 
LVL 1

Author Comment

by:wheelibin
ID: 18887984
Hi, they are both DATE fields
0
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 250 total points
ID: 18888072
ok, here we go:
AND G16.DESPDATE         >= to_date('27/03/2007 17:00','DD/MM/YYYY HH24:MI')  
AND G16.DESPDATE         <= to_date('28/03/2007 23:45','DD/MM/YYYY HH24:MI')  
AND to_date( to_char( G16.DESPDATE, 'YYYY-MM-DD') || ' ' || to_char( G16.DESPTIME , 'HH24:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') >= to_date('27/03/2007 17:00','DD/MM/YYYY HH24:MI')  
AND to_date( to_char( G16.DESPDATE, 'YYYY-MM-DD') || ' ' || to_char( G16.DESPTIME , 'HH24:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') <=to_date('28/03/2007 23:45','DD/MM/YYYY HH24:MI')  
0
 
LVL 1

Author Comment

by:wheelibin
ID: 18888145
Thanks for your quick answer.....your example gives me "Invalid Number" which can only be because of the zero date.  If I select this "to_char( G16.DESPTIME , 'HH24:MI:SS')," it returns "00:00:00".

I have solved it by using your code but adding 366 to G16.DESPTIME (which should make the date 01/01/01).

This is now working:
AND G16.DESPDATE         >= to_date('27/03/2007','DD/MM/YYYY')  
AND G16.DESPDATE         <= to_date('28/03/2007','DD/MM/YYYY')  
AND to_date( to_char( G16.DESPDATE, 'YYYY-MM-DD') || ' ' || to_char( G16.DESPTIME +366 , 'HH24:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') >= to_date('27/03/2007 17:00','DD/MM/YYYY HH24:MI')  
AND to_date( to_char( G16.DESPDATE, 'YYYY-MM-DD') || ' ' || to_char( G16.DESPTIME +366, 'HH24:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') <=to_date('28/03/2007 23:45','DD/MM/YYYY HH24:MI')  

Thanks a lot for that
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction A previously published article on Experts Exchange ("Joins in Oracle", http://www.experts-exchange.com/Database/Oracle/A_8249-Joins-in-Oracle.html) makes a statement about "Oracle proprietary" joins and mixes the join syntax with gen…
Cursors in Oracle: A cursor is used to process individual rows returned by database system for a query. In oracle every SQL statement executed by the oracle server has a private area. This area contains information about the SQL statement and the…
This video shows syntax for various backup options while discussing how the different basic backup types work.  It explains how to take full backups, incremental level 0 backups, incremental level 1 backups in both differential and cumulative mode a…
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.
Suggested Courses

622 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question