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How to get previous week friday based on sysdate.

Posted on 2016-10-12
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Last Modified: 2016-10-23
How to get previous week friday based on sysdate.  We are planning to include this logic on a job that runs daily.

Please advise !
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Question by:d27m11y
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2 Comments
 
LVL 77

Expert Comment

by:slightwv (䄆 Netminder)
ID: 41841054
Try this:
select next_day(sysdate-7,'FRIDAY') from dual;
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Accepted Solution

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johnsone earned 2000 total points
ID: 41841769
If the current day is Friday, what do you want returned.  Let's say that today is 10/07/2016.  Should it return 10/07/2016 or 09/30/2016?

If the current day is a Friday, sysdate-7 will return today, not last Friday.  If you truly want last Friday, you have to do sysdate-8.

This will show the difference between minus 7 and minus 8:
WITH x 
     AS (SELECT To_date('10022016', 'mmddyyyy') + LEVEL - 1 dt 
         FROM   dual 
         CONNECT BY LEVEL < 8) 
SELECT dt, 
       Next_day(dt - 7, 'FRIDAY') minus7, 
       Next_day(dt - 8, 'FRIDAY') minus8 
FROM   x; 

Open in new window

Notice that the difference is on the Friday (10/07).
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