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Oracle syntax

Posted on 2013-02-04
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Last Modified: 2013-02-07
I have a query that has 2 dates(start and end date) and if it does not have a value, then its considered a blank, and I want to sort by another date(create date) but if the date has a value I want it sorted by start date. In other words I want the blanks to use create date and if it has a value sort by the start date but I want them all in one sortable field

So maybe we can include an aliased field that has the logic above and I can sort a column but it would have to be a mixture of the 2 fields so if I have 3 records2 with start dates and one blank that has a create date in between the 2 start dates I want them coming back with the blank as the middle date from the sort....

Hope this makes sense.
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Question by:jknj72
9 Comments
 
LVL 74

Accepted Solution

by:
sdstuber earned 250 total points
ID: 38851045
select * from your_table
order by nvl(start_date, create_date)


if that doesn't do it, please provide sample data an expected output
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Author Comment

by:jknj72
ID: 38851066
I think that will work how can I get that into one aliased field in my select statement?

logic
if start_date = '' then
     create_date
else
  start_date
end if as 'SORTED DATE'

What would be the syntax for this?
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LVL 143

Assisted Solution

by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 250 total points
ID: 38851073
same expression:

select nvl(start_date, create_date) sorted_date
  from yourtable ...
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Author Comment

by:jknj72
ID: 38851092
that should do it. Thanks for your help
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Author Comment

by:jknj72
ID: 38851098
thanks
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LVL 74

Expert Comment

by:sdstuber
ID: 38851100
isn't a split in order?  the accepted post simply restates the same expression originally posted
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LVL 32

Expert Comment

by:awking00
ID: 38851672
FWIW, could also have used coalesce(start_date, create_date) sorted_date.
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Author Closing Comment

by:jknj72
ID: 38865248
thanks
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