How to select dates by year?

Question

Hi,
Lets say I have a table(itemID, datePurchase, itemPrice)
and I want to list the sum of itemPrice based on the year of datePurchase.
eg. I want the total amount spent in the year 2007
DATEPURCHASE ITEMPRICE
04-OCT-07 300
07-NOV-07 250
17-JAN-08 125
16-NOV-08 250
27-NOV-08 250
17-DEC-09 200
How do I filter the date out by year?
Regards,
Keith

Answer 1

Hi,
Welcome to the forum!
If you're hard-coding the target date, you can do something like this:
SELECT     SUM (itemprice)     AS total_price
FROM     table_x
WHERE     datepurchase     >= DATE '2007-01-01'
AND     datepurchase     <  DATE '2008-01-01'
;If the year is in a variable, then you'll want something more like this:
VARIABLE  year_wanted  VARCHAR2 (4)
EXEC     :year_wanted := '2007';
SELECT     SUM (itemprice)     AS total_price
FROM     table_x
WHERE     datepurchase     >= TO_DATE ( year_wanted || '-01-01'
                          , 'YYYY-MM-DD'
AND     datepurchase     <  TO_DATE ( year_wanted || '-12-31'
                          , 'YYYY-MM-DD'
                       ) + 1
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables involved, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using (e.g., 11.2.0.2.0).
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Edited by: Frank Kulash on Oct 4, 2012 12:18 PM
Added keyword DATE to date literals.