Function to calculate the Minutes of business between two Dates

Hello

I use the version of database Oracle 11.2.1. I would like to calculate the number of minutes of work between the two dates where working hours are Monday - Thursday from 08:45 to 17:00 and Friday from 08:45 to 16:30

I found the following function useful in a similar position but wanted help picking up the days and the hours above into account

CREATE OR REPLACE
  FUNCTION get_bus_minutes_between(
                                   p_start_date DATE,
                                   p_end_date DATE
                                  )
    RETURN NUMBER
    IS
        v_return NUMBER;
    BEGIN
        with t as (
                   select  case level
                             when 1 then greatest(p_start_date,trunc(p_start_date) + 9 / 24)
                             else trunc(p_start_date) + level - 15 / 24
                           end start_dt,
                           case connect_by_isleaf
                             when 1 then least(p_end_date,trunc(p_end_date) + 18 / 24)
                             else trunc(p_start_date) + level - 8 / 24
                           end end_dt
                     from  dual
                     connect by level <= trunc(p_end_date) - trunc(p_start_date) + 1
                  )
        select  sum(greatest(end_dt - start_dt,0)) * 24 * 60 work_minutes
          into  v_return
          from  t
          where trunc(start_dt) - trunc(start_dt,'iw') < 5; -- exclude weekends
        RETURN v_return;
END;
/

Can anyone help?

Hello

Think about what you do.

sliderrules wrote:

SELECT TO_CHAR (DATE ' 1-1-1' + business_end_time, 'HH24:MI:SS')-TO_CHAR (DATE ' 1-1-1' + business_start_time, 'HH24:MI:SS') * 24 * 60

of time_dim

where full_date = July 1, 2013.

AND working_day = 'Y ';

The following error is returned:

ORA-01722: invalid number

The time is converted to character reslting with this error. Is there a better way to subrtacting types of data INTERVAL DAY (1) SECOND (2) (business_end_time - business_start_time)

To_char, as its name implies, returns a string of characters.  You say that

TO_CHAR (...) - TO_CHAR (...) * 24 * 60

If you ask for the string returned by the 2nd TO_CHAR be multiplied by 24.  Does make any sense to you?

Maybe you wanted to do the subtraction first, which would be

(TO_CHAR (...) - TO_CHAR (...)) * 24 * 60

but still would be a mistake, because you can't subtract a string to another string (or anything else).

.

Last Friday, I proposed this:

SELECT SUM (LESS (end_dt, v_end_dt)

-Most GREAT (start_dt, v_start_dt)

) * 24 * 60...

where start_dt and end_dt were the DATE in the table columns, as the value returned by TO_DATE (08 11 July 2013:45 ', "DD-Mon-YYYY HH24").

If I understand correctly, you would store stores rather 3 columns: full_date (a DATE, where the time part is 00:00:00) as well as business_start_time and business_end_time (the two INTERVAL DAY TO SECOND).  In this case, you can modify the code above to say:

SELECT SUM (LESS (full_date + business_end_time, v_end_dt)

-GREATEST (full_date + business_start_time, v_start_dt)

) * 24 * 60...

You can add a DATE at an INTERVAL;  the result will be a DATE.  There is no need to convert anything to a data type to the other.

Tags: Database

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    FUNCTION to CREATE or REPLACE nb_days (p_date_from IN DATE

    p_date_to DATE by DEFAULT TRUNC (sysdate)

    , p_public_holidays in CHAR DEFAULT 'Y '.

    ) RETURN NUMBER

    DEFINE AUTHID

    AS

    /*********************************************************************/

    / * Author: Bruno Vroman * /.

    / * Created: 23-AUG-2012 * /.

    / * Last updated: 23-AUG-2012 * /.

    / * Object: to calculate the number of days between 2 dates, to the exclusion of * /.

    / * Saturday and Sunday, but also "holidays" If the * /.

    / * argument 'p_public_holidays' = 'Y ' * /.

    / * Support: p_date_from<= p_date_to                             ="">

    / * component ' hour min dry "ignored (just counting days) * /.

    /* First step:                                                       */

    / * the calendar days between 2 days * /.

    / Remove 2 days for each "week" and 0 or 1 extra day * /.

    / * function to a condition "complex" mix day of first week * /.

    / * and the number of days when full remaining weeks are removed * /.

    / * (set up once for all, for example if there is 3 days and the * /)

    (/ * first day is a Thursday, there is 1 "Sat/Sun" to subtract) * /.

    / * Second step: If 'p_public_holidays' = 'Y': other * /.

    / * days, do not count holidays.                         */

    / Holiday everyday are defined in a table "public_holiday" * /.

    / * Note: there may be holidays defined on Saturday/Sunday.       */

    /*********************************************************************/

    l_result NUMBER;

    l_from DATE;

    l_to DATE;

    l_case tank (4);

    BEGIN

    l_from: = TRUNC (p_date_from);

    l_to: = TRUNC (p_date_to);

    l_case: = TO_CHAR (l_from, 'Dy', 'NLS_DATE_LANGUAGE = English').

    To_char (MOD (l_to - l_from + 1, 7));

    l_result: = l_to - l_from + 1

    -TRUNC ((l_to-l_from + 1) / 7) * 2

    -CASE

    WHEN l_case IN ('Mon6', 'Tue5', 'Wed4', 'Thu3', 'Fri2'

    , "Sat1", "Sun1", "Sun2', 'Sun3", "Sun4".

    , "Sun5', 'Sun6.

    )

    THEN 1

    WHEN l_case IN ('Tue6', 'Wed5', 'Wed6', 'Thu4', "Thu5"

    , 'Thu6', 'Fri3', 'Fri4', 'Fri5', 'Fri6 '.

    , "Sat2", "Sat3', 'Sat4', 'Sat5", "Sat6.

    )

    THEN 2

    0 OTHERWISE

    END

    ;

    IF SUPERIOR (p_public_holidays) = "Y".

    THEN

    SELECT l_result - COUNT (*)

    IN l_result

    OF public_holiday p

    WHERE p.calendar_day > = l_from

    AND p.calendar_day<=>

    AND SUBSTR (TO_CHAR (p.calendar_day

    , "Dy".

    'NLS_DATE_LANGUAGE = English'

    )

    , 1, 1 ) != 'S'

    ;

    END IF;

    RETURN l_result;

    EXCEPTION

    WHILE OTHERS

    THEN

    DBMS_OUTPUT. Put_line (' CTF nb_days (' |))

    To_char (p_date_from, "MON-DD-YYYY"). ', ' ||

    To_char (p_date_to, "MON-DD-YYYY"). ', ' ||

    p_public_holidays | ' ) : ' || SQLERRM

    );

    LIFT;

    END nb_days;

    /

    REM

    REM example:

    REM A) fill out the 'public_holidays '.

    REM

    TRUNCATE TABLE public_holiday;

    INSERT INTO public_holiday VALUES (DATE ' 2012-01-01', ' new year (a Sunday)');

    INSERT INTO public_holiday VALUES (DATE '' 2012-01-03, "for example");

    REM (insert other days...)

    COMMIT;

    Call the function for some pairs of dates of REM B)

    REM nb1: remove only Sat/Sun

    REM nb2: also remove holidays

    REM

    ALTER SESSION SET nls_date_format ='Dy DD-MON-YY';

    WITH some_dates AS

    (SELECT DATE ' 2011-12-29'd dual FROM

    UNION ALL SELECT DATE ' 2012-01-08' FROM dual

    UNION ALL SELECT DATE ' 2012-01-10' FROM dual

    )

    SELECT d1.d 'FROM '.

    , d2.d ' to THE '.

    , nb_days (d1.d, d2.d, ' don't) nb1

    , nb_days (d1.d, d2.d, 'Y') nb2

    OF some_dates d1

    some_dates d2

    WHERE d1.d<=>

    ORDER BY nb1, nb2, d1.d

    ;

    GO TO NB1 NB2

    ------------- ------------- ---- ----

    Monday, January 8, 12 Monday, January 8, 12 0 0

    Friday, December 29, 11 Friday, December 29, 11 1 1

    Wednesday, January 10, 12 Wednesday, January 10, 12 1 1

    Monday, January 8, 12 Wednesday, January 10, 12 2 2

    Friday, December 29, 11 Monday, January 8, 12 7 6

    Friday, December 29, 11 Wednesday, January 10, 12 9 8

    Hope that this could be useful, but note that this code has not been completely tested, so check and test before you trust it (in the case of any questions, please post a comment)

    Bruno Vroman.

    Best regards

    Bruno

  • Calculate the (age) years between two dates

    Nice day!

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