Dates of the fortnight of days between two dates

Hello

I want to show every fortnight dates based on the date, to date and the day of week (sunday, monday...)

Input parameters
Date: 31/05/2011
To date: 30/06/2011
day of week: Thursday

Output
06/02/2011
16/06/2011
30/06/2011


Input parameters
Date: 25/06/2011
To date: 30/06/2011
day of week: Monday

Output
27/06/2011

can someone help me?

Published by: user10594152 on May 30, 2011 22:10

Published by: user10594152 on May 30, 2011 22:19

Hello

Here's one way:

WITH     parameters     AS
(
     SELECT     DATE '2011-05-31'     AS start_date
     ,     DATE '2011-06-30'     AS end_date
     ,     'Thursday'          AS day_o_week
     FROM     dual
)
,     got_dt     AS
(
     SELECT     end_date
     ,     NEXT_DAY ( start_date - 1
                , day_o_week
                ) + (14 * (LEVEL - 1))     AS dt
     FROM     parameters
     CONNECT BY     LEVEL     <= CEIL     ( (end_date - start_date)
                         / 14
                         )
)
SELECT     dt
FROM     got_dt
WHERE     dt     <= end_date
;

This ID on NLS_DATE_LANGUAGE load. If you do not what it is, you can change the sub-quewry like this:

WITH     parameters     AS
(
     SELECT     DATE '2011-06-25'     AS start_date
     ,     DATE '2011-06-30'     AS end_date
     ,     TO_CHAR ( DATE '2011-05-30'     -- or any Monday
               , 'Day'
               )          AS day_o_week
     FROM     dual
) ...

Published by: Frank Kulash, 30 May 2011 13:13
Adding a warning about NLS_DATE_LANGUAGE

Tags: Database

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