Solved

Oracle date question

Posted on 2014-01-31
8
397 Views
Last Modified: 2014-02-04
i HAVE A QUERY

   select nvl(sum(recovered_shp_liters_qty), 0)recovered_shp_qty
     from pla_quantities
    where blood_center_key = 2
      AND RECOVERED_SHP_LITERS_QTY <> 0
      and process_date between :p_start_date and :coll_date;

I am doing a graph. For the above period I am getting the graph. Now I need to compare the graph for the data for 2012. No matter what date range they enter I have to go back to 2012.

I can hardcode p_start_date to be '01-jan-2012'
but coll_date is the one I get from the table to do year to date graph. My question is based on what the coll_date is can we get that to go back to 2012 ?
Can I use a decode or case statement to go back to 2012 of coll_date?


  and coll_date has to be
0
Comment
Question by:anumoses
[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
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 35

Accepted Solution

by:
johnsone earned 250 total points
ID: 39824135
Assuming that coll_date could be any year, then this should give the same date in 2012

to_date(to_char(coll_date, 'mmddhh24miss')||'2012', 'mmddhh24missyyyy')
0
 
LVL 6

Author Comment

by:anumoses
ID: 39824157
If I dont need the time stamp then will this be corect?

TO_DATE(TO_CHAR(COLL_DATE, 'MMDD')||'2012', 'MMDDYYYY')
0
 
LVL 35

Expert Comment

by:johnsone
ID: 39824176
Yes.  coll_date has a time portion to it (all dates do), so I was just copying what was there.  If the time portion is 00:00:00 in the original, that that will just get copied.  No harm.
0
PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

 
LVL 32

Expert Comment

by:awking00
ID: 39824915
Another way -
to_date('2012','yyyy') + (coll_date - trunc(coll_date,'yy'))
0
 
LVL 77

Expert Comment

by:slightwv (䄆 Netminder)
ID: 39825000
>>Another way -

Seems to drop a day from time to time (unless I have a typo):
select to_date('2012','yyyy') + (to_date('10/10/2013') - trunc(to_date('10/10/2013'),'yy')) from dual;
0
 
LVL 32

Expert Comment

by:awking00
ID: 39825047
Yeah, the problem here is that 2012 is a leap year. The difference in days of a non-leap year date and the first of that year will not produce the same day for a leap year unless the date is on or before February 28. One could create a case statement to deal with that, of course, but that might perform worse that converting to character and back to date again. :-(
0
 
LVL 35

Expert Comment

by:johnsone
ID: 39825149
Well, if you want to get fancy, then you could do this:

add_months(coll_date, (2012 - to_number(to_char(coll_date, 'yyyy')))*12)

Still has some conversions to it though.

It would be best to stay away from using the "day" math.  Almost impossible to account for leap years, as you have seen.
0
 
LVL 6

Author Closing Comment

by:anumoses
ID: 39832315
thanks
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

Truncate is a DDL Command where as Delete is a DML Command. Both will delete data from table, but what is the difference between these below statements truncate table <table_name> ?? delete from <table_name> ?? The first command cannot be …
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
This video shows how to recover a database from a user managed backup
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.

730 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