Every Friday date given quarter

Question

How do you return the date for every Friday given the quarter? Thank you.

Answer 1

Hi,
Welcome to the forum!
This will show all the Fridays in the same quarter as target_date:
DEFINE     target_date     = "DATE '2010-04-24'"
WITH     got_a_date          AS
     SELECT     NEXT_DAY ( TRUNC (&target_date, 'Q') - 1
                 , 'FRIDAY'   -- NLS dependent.  See note below
                 ) + ( 7
                         * (LEVEL - 1)
                         )            AS a_date
     FROM     dual
     CONNECT BY     LEVEL <= 14
SELECT       a_date
FROM       got_a_date
WHERE       TRUNC (a_date, 'Q')     = TRUNC (&target_date, 'Q')
ORDER BY  a_date
;This depends on NLS_DATE_LANGUAGE. If you can't count on that, then use
TO_CHAR ( DATE '2010-04-23'    -- or any date you know is a Friday
        , 'DAY'
        )instead of the literal 'FRIDAY' as the 2nd argument to NEXT_DAY.
This relies on the fact that there are, at most, 92 days in any quarter, and therefore there will never be more than 14 of any given weeekday in any quarter. ( (7 * 14) > 92) That explains the "magic number" 14 in the CONNECT BY clause of got_a_date.