oracle sql get last Sunday and last Saturday

StackOverflow https://stackoverflow.com/questions/17531100

  •  02-06-2022
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Domanda

I will calculate last Sunday and last Saturday on every Monday.

E.g. today is 08 July 2013 Monday

last Sunday: 30 June 2013 00:00:00

last Saturday: 6 July 2013 23:59:59.

Note the last Sunday is from 00:00:00 and last Saturday is until 23:59:59

È stato utile?

Soluzione 4

Given your question, where the query will be run only on Mondays and the objective is to obtain the dates as stated above, one way to solve it is:

SELECT TRUNC(SYSDATE) AS TODAYS_DATE,
       TRUNC(SYSDATE)-8 AS PREVIOUS_SUNDAY,
       TRUNC(SYSDATE) - (INTERVAL '1' DAY + INTERVAL '1' SECOND) AS PREVIOUS_SATURDAY
  FROM DUAL

Share and enjoy.

Altri suggerimenti

For those looking to get the last weekend days (Saturday and Sunday) on week where the first day is Monday, here's an alternative:

select today as todays_date,
       next_day(today - 7, 'sat') as prev_saturday, 
       next_day(today - 7, 'sun') as prev_sunday
from dual

Query for get last SUNDAY :

SELECT TRUNC(SYSDATE)-(select to_char(sysdate-1, 'd') FROM DUAL) FROM DUAL

Query for get last SATURDAY :

SELECT TRUNC(SYSDATE)-(select to_char(sysdate, 'd') from dual) FROM DUAL

If you want get previous SUNDAY/SATURDAY you need add to the sysdate - for example :

Previous Sunday:

SELECT TRUNC(SYSDATE)-(select to_char(sysdate, 'd')+6 FROM DUAL) FROM DUAL

Previous Saturday:

SELECT TRUNC(SYSDATE)-(select to_char(sysdate, 'd')+7 FROM DUAL) FROM DUAL

The advantage of this approach is that you can do this query each day of the week enjoy

Here is the quickest way to get the last Saturday or last Sunday from ANY day of the week:

Last Saturday:

select trunc(SYSDATE) - to_char(sysdate, 'd')  from dual;

Last Sunday:

select trunc(SYSDATE) - (to_char(sysdate, 'd')-1)  from dual;

Apologies for taking 6 years to give you the best answer. ;)

This will be more useful. You can take Last Saturday or Sunday from any given day(Not only Monday) by using the query below.

select NEXT_DAY(sysdate-7, 'SATURDAY') AS last_saturday,
       NEXT_DAY(sysdate-7, 'SUNDAY') AS last_sunday
from dual;

Use the following PLSQL Function to get the DayDate of Week.

Usage of function to get Day of Month.

SELECT
 DayofMonth(to_date('2020-03-29T01:00Z', 'yyyy-mm-dd"T"hh24:mi"Z"'), 'FRI', 'LAST') LASTFRI    -- 27-MAR-2020 01:00:00
 ,DayofMonth(to_date('2020-03-29T01:00Z', 'yyyy-mm-dd"T"hh24:mi"Z"'), 'SUN', 'FIRST') FIRSTSUN -- 01-MAR-2020 01:00:00
 ,DayofMonth(to_date('2020-03-29T01:00Z', 'yyyy-mm-dd"T"hh24:mi"Z"'), 'SUN', 'THIRD') THIRDSUN -- 15-MAR-2020 01:00:00
 
 ,DayofMonth(to_date('2020-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"'), 'SUN', 'THIRD') THIRDSUN_FEB29  -- 16-FEB-2020 01:01:00
 ,DayofMonth(to_date('2021-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"'), 'SUN', 'FOURTH') FouthSUN_FEB28 -- 28-FEB-2021 01:01:00
from dual;

PLSQL-Function: Below function which identifies the Last Day of the Month, Converts to Number using TO_NUMBER() function to pass as a parameter to LAST_DAY() function.

create or replace FUNCTION DayofMonth 
(dateOfMonth in date, dayOfWeek in varchar2 default 'SUN', weekOfMonth in varchar2 default 'LAST')
return date AS date_out date;

firstDayOfMonth number(5); lastDayOfMonth number(5);
monthFirstDayDate date; monthSecondDayDate date;
monthThirdDayDate date; monthFourthDayDate date;
monthLastDayDate date;
BEGIN

  SELECT TO_NUMBER(to_char( trunc(dateOfMonth) - (to_number(to_char(dateOfMonth,'DD')) - 1), 'DD'), '9G999D99') into firstDayOfMonth FROM dual;
  SELECT TO_NUMBER(to_char(trunc( add_months(trunc(dateOfMonth) - (to_number(to_char(dateOfMonth,'DD')) - 1), 1) -1 ), 'DD'), '9G999D99') into lastDayOfMonth FROM dual;
DBMS_OUTPUT.put_line('firstDayOfMonth:' || firstDayOfMonth || ', lastDayOfMonth:' || lastDayOfMonth);

select next_day(LAST_DAY(dateOfMonth) - (lastDayOfMonth - (7 * 0)), dayOfWeek) into monthFirstDayDate   FROM DUAL;
select next_day(LAST_DAY(dateOfMonth) - (lastDayOfMonth - (7 * 1)), dayOfWeek) into monthSecondDayDate  FROM DUAL;
select next_day(LAST_DAY(dateOfMonth) - (lastDayOfMonth - (7 * 2)), dayOfWeek) into monthThirdDayDate   FROM DUAL;
select next_day(LAST_DAY(dateOfMonth) - (lastDayOfMonth - (7 * 3)), dayOfWeek) into monthFourthDayDate  FROM DUAL;
select next_day(LAST_DAY(dateOfMonth) - (7),                        dayOfWeek) into monthLastDayDate    FROM DUAL;

DBMS_OUTPUT.put_line('monthFirstDayDate:'  || monthFirstDayDate || ', monthSecondDayDate:' || monthSecondDayDate);
DBMS_OUTPUT.put_line('monthThirdDayDate:'  || monthThirdDayDate || ', monthFourthDayDate:' || monthFourthDayDate);
DBMS_OUTPUT.put_line('monthLastDayDate:'   || monthLastDayDate);

IF (weekOfMonth = 'LAST') then
  date_out := monthLastDayDate;
ELSIF (weekOfMonth = 'FIRST') then
  date_out := monthFirstDayDate;
ELSIF (weekOfMonth = 'SECOND') then
  date_out := monthSecondDayDate;
ELSIF (weekOfMonth = 'THIRD') then
  date_out := monthThirdDayDate;
ELSIF (weekOfMonth = 'FOURTH') then
  date_out := monthFourthDayDate;
ELSE
  date_out := null;
END IF;

    return date_out;
EXCEPTION
    when others then
        DBMS_OUTPUT.put_line('Date:' || dateOfMonth || ', Day:' || dayOfWeek || ', Week:' || weekOfMonth || ' / ' || sqlcode || ' / ' || SQLERRM(sqlcode));
        date_out := null;
        return date_out;
END;
/

First and Last Day of Month - Oracle SQL

SELECT
  to_char( trunc(sysdate) - (to_number(to_char(sysdate,'DD')) - 1), 'DD') as firstDay
  ,to_char(trunc( add_months(trunc(sysdate) - (to_number(to_char(sysdate,'DD')) - 1), 1) -1 ), 'DD') as lastDay
FROM dual;

Tests to check the Day of the Month with out any function:

select
    next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 7, 'sun') as JAN_Month_Last_SUNDAY31 -- 31-JAN-2021 01:01:00
    ,next_day(LAST_DAY(to_date('2021-02-01T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 7, 'sun') as FEB_Month_Last_SUNDAY28 -- 28-FEB-2021 01:01:00
    ,next_day(LAST_DAY(to_date('2021-04-01T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 7, 'sun') as APRL_Month_Last_SUNDAY30 -- 25-APR-2021 01:01:00
    
    ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 31, 'sun') as JAN_Month_First_SUNDAY31 -- 31-JAN-2021 01:01:00
    ,next_day(LAST_DAY(to_date('2021-02-01T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 28, 'sun') as FEB_Month_First_SUNDAY28 -- 28-FEB-2021 01:01:00
    ,next_day(LAST_DAY(to_date('2021-04-01T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 30, 'sun') as APRL_Month_First_SUNDAY30 -- 25-APR-2021 01:01:00
FROM DUAL;

select
  next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 7, 'mon') as JAN_Month_Last_Mon31
  ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - 7, 'fri') as JAN_Month_Last_Fri31
  ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (31 - (7 * 0)), 'fri') as JAN_Month_First_Fri31
  ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (31 - (7 * 1)), 'fri') as JAN_Month_Second_Fri31
  ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (31 - (7 * 2)), 'fri') as JAN_Month_Third_Fri31
  ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (31 - (7 * 3)), 'fri') as JAN_Month_Fourth_Fri31
  ,next_day(LAST_DAY(to_date('2021-01-29T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (31), 'fri') as JAN_Month_Last_Fri31
FROM DUAL;

select
  next_day(LAST_DAY(to_date('2021-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (28 - (7 * 0)), 'fri') as FEB_Month_First_Fri28
  ,next_day(LAST_DAY(to_date('2021-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (28 - (7 * 1)), 'fri') as FEB_Month_Second_Fri28
  ,next_day(LAST_DAY(to_date('2021-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (28 - (7 * 2)), 'fri') as FEB_Month_Third_Fri28
  ,next_day(LAST_DAY(to_date('2021-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (28 - (7 * 3)), 'SUN') as FEB_Month_Fourth_Fri28
  ,next_day(LAST_DAY(to_date('2021-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (7), 'fri') as FEB_Month_Last_Fri28
FROM DUAL;

select
  next_day(LAST_DAY(to_date('2020-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (29 - (7 * 0)), 'fri') as FEB_Month_First_Fri29
  ,next_day(LAST_DAY(to_date('2020-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (29 - (7 * 1)), 'fri') as FEB_Month_Second_Fri29
  ,next_day(LAST_DAY(to_date('2020-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (29 - (7 * 2)), 'fri') as FEB_Month_Third_Fri29
  ,next_day(LAST_DAY(to_date('2020-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (29 - (7 * 3)), 'fri') as FEB_Month_Fourth_Fri29
  ,next_day(LAST_DAY(to_date('2020-02-02T01:01Z', 'yyyy-mm-dd"T"hh24:mi"Z"')) - (7), 'fri') as FEB_Month_Last_Fri29
FROM DUAL;
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