Between specific dates per month SQL

Question

All,
I am creating a query that I need to pull between certain dates for each month. If this was a one time thing, I could do the simple between call, but.... What I am trying to do is have a query from our system run at the end of each month to pull the pay period dates. For example, for a pay run period between 24-JAN-2012 and 23-FEB-2012 the query would pull those dates at the end of FEB, and the same for end of MAR that would pull between 24-FEB-2012 and 23-MAR-2012,
and so on, and so on.
CREATE TABLE     ps_paycal
(emplid               NUMBER (6)           PRIMARY KEY
,     name          VARCHAR2 (12)
,     frozen_dt      date
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','24-JAN-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','23-FEB-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','24-FEB-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','23-MAR-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','24-MAR-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','23-APR-2012');
Hope this makes sense. Anyway, this is Oracle 11g.
Thanks for the help!
Karsten

Answer 1

Karsten Hilton wrote:
All,
I am creating a query that I need to pull between certain dates for each month. If this was a one time thing, I could do the simple between call, but.... What I am trying to do is have a query from our system run at the end of each month to pull the pay period dates. For example, for a pay run period between 24-JAN-2012 and 23-FEB-2012 the query would pull those dates at the end of FEB, and the same for end of MAR that would pull between 24-FEB-2012 and 23-MAR-2012,
and so on, and so on.
CREATE TABLE     ps_paycal
(emplid               NUMBER (6)           PRIMARY KEY
,     name          VARCHAR2 (12)
,     frozen_dt      date
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','24-JAN-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','23-FEB-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','24-FEB-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','23-MAR-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','24-MAR-2012');
INSERT INTO ps_employees (emplid,name,date)
VALUES          (111111,'JOHN DOE','23-APR-2012');
Hope this makes sense. Anyway, this is Oracle 11g.
Thanks for the help!
KarstenWell, assuming that's a constant (the pay period start date being the 24th of the previous month) you could do something like this to get your pay period start / end dates.
select pay_start, add_months(pay_start, 1) - 1
from
  select to_date(to_char(add_months(sysdate, -1), 'yyyy-mm') || '-24', 'yyyy-mm-dd') as pay_start
  from dual
)