| week of year calc [message #39753] |
Wed, 07 August 2002 07:22  |
ron
Messages: 50
Registered: July 1999
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Member |
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hello
I am doing the following SQL
select to_char((calendar_date), 'ww'), calendar_date, day_of_week from calendar
I am getting weeks 1-53 for a given year however at
however this returns week as 7 days regardless of the
day of the week.
I need the saturday to sunday week.
dec 31 1995 - jan 6 1996 need to be either week 53 of 1995 or week 1 of 1995
Now I get DEC 31 1995 is week 53 and Jan 1 1996 -Jan 7 1995 week 1
TIA
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| Re: week of year calc [message #39754 is a reply to message #39753] |
Wed, 07 August 2002 09:01  |
sverch
Messages: 582
Registered: December 2000
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Senior Member |
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SQL> SELECT DECODE(TO_CHAR(SYSDATE,'DY'),'SAT',SYSDATE,NEXT_DAY(SYSDATE-7,'SATURDAY'))
2 week_starts,
3 DECODE(TO_CHAR(SYSDATE,'DY'),'SUN', SYSDATE,
4 NEXT_DAY(SYSDATE,'SUNDAY')) week_ends
5 FROM DUAL;
WEEK_STARTS WEEK_ENDS
----------- -----------
03-AUG-2002 11-AUG-2002
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| the same with week# [message #39755 is a reply to message #39753] |
Wed, 07 August 2002 09:08 |
sverch
Messages: 582
Registered: December 2000
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Senior Member |
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SQL> SELECT DECODE(TO_CHAR(SYSDATE,'DY'),'SAT',SYSDATE,NEXT_DAY(SYSDATE-7,'SATURDAY'))
2 week_starts,
3 DECODE(TO_CHAR(SYSDATE,'DY'),'SUN', SYSDATE,
4 NEXT_DAY(SYSDATE,'SUNDAY')) week_ends,
5 TO_CHAR(SYSDATE,'IW') Num
6 FROM DUAL;
WEEK_STARTS WEEK_ENDS NU
----------- ----------- --
03-AUG-2002 11-AUG-2002 32
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