Comments on: SQL – Finding the Last Weekday in a Month

By: theo

theo — Fri, 16 Oct 2009 11:17:25 +0000

You could also use the oracle greatest function, thus eliminating all the unions:
SELECT greatest ( next_day((last_day(sysdate) - 7), 'Monday'), next_day((last_day(sysdate) - 7), 'Tuesday'), next_day((last_day(sysdate) - 7), 'Wednesday'), next_day((last_day(sysdate) - 7), 'Thursday'), next_day((last_day(sysdate) - 7), 'Friday') ) day from dual

By: kintaro

kintaro — Thu, 23 Oct 2008 14:47:15 +0000

Sorry for that here’s the correct one.

with t as (
select ’30-sep-08′ toDay from dual )
select
case
when to_char( last_day( add_months(today, -1) ), ‘D’ ) in (7, 1) then
next_day( last_day( add_months(today, -1) ), 6 ) – 7
else last_day( add_months( today, -1 ) )
end last_weekday
from t

By: kintaro

kintaro — Thu, 23 Oct 2008 14:38:42 +0000

You could also try this one (Although this gets for the last month’s last weekday):

with t as (
select ’01-jul-08′ toDay from dual )
select
case
when to_char( last_day( add_months(today, -1) ), ‘D’ ) in (7, 1) then
next_day( today, 6 ) – 7
else last_day( add_months( today, -1 ) )
end last_weekday
from t

By: Wouter

Wouter — Tue, 02 Sep 2008 06:47:28 +0000

Unfortunately both solutions depend on the user session to use US day names. In an international environment you should either add NLS_DATE_LANGUAGE parameters, or instead of using DY, use D (which uses numeric values) to test for a given day of the week.

By: Skydogs

Skydogs — Mon, 18 Jun 2007 23:10:18 +0000

Short and simple:

select
decode(
to_char(last_day(sysdate),’DY’) –FET DAY OF WEEK FOR LAST DAY OF MONTH.
,’SAT’,last_day(sysdate)-1 –RETURN FRIDAY
,’SUN’,last_day(sysdate)-2 –RETURN FRIDAY
,last_day(sysdate) — ELSE RETURN LAST DAY OF MONTH
) last_day_of_current_month from dual

By: Andre

Andre — Fri, 09 Jun 2006 17:23:28 +0000

How we find in the data base all the “dates” that belong to the last month compared to the current date (sysdate)????????

By: Jon

Jon — Wed, 25 Jan 2006 13:22:28 +0000

Veronica, unfortunately I don’t have this for Access. I’m not too familiar with Access and I’m sure the date functionality works differently. Sorry.

By: VERONICA

VERONICA — Wed, 25 Jan 2006 04:33:47 +0000

very handy and useful code.
do you have the similar code for access database query for the following, get the last friday of current month?

next_day((last_day(to_date((sysdate),’DD/MM/YYYY’)) – 7), ‘Friday’)

By: Jon

Jon — Thu, 12 Jan 2006 02:14:37 +0000

I posted Oraboy’s SQL at the bottom of this article (see UPDATE).

By: Oraboy

Oraboy — Wed, 11 Jan 2006 17:55:29 +0000

I have posted the SQL for this here..
http://www.lifeaftercoffee.com/2005/11/29/performing-math-on-oracle-dates/#comment-138