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Editorial Team
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Asked: 2026-05-31T15:39:45+00:00

Is there any better approach than the function code below // checks whether the

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Is there any better approach than the function code below 

// checks whether the IN data falls on a weekend 
CREATE OR REPLACE FUNCTION business_days(start_date IN DATE)
   RETURN NUMBER IS
busdays NUMBER := 0;
stDate DATE;

BEGIN

stDate := TRUNC(start_date);

  /* Adjust for ending date on a saturday */
  IF  TO_CHAR(enDate,'D') = '7'    THEN
    busdays := busdays - 1;
  END IF;

  /* Adjust for starting date on a sunday */
  IF TO_CHAR(stDate,'D') = '1' THEN
    busdays := busdays - 1;
  END IF;
else
   busdays := 0;
END IF;

  RETURN(busdays);
END;
/
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1 Answer

  1. Editorial Team

    In Oracle, days of the week starts with Monday (which corresponds to 1); therefore if you are to find whether a day falls into weekend you need to compare it with number 6 and 7 (corresponding to Saturday and Sunday) such as:

    if to_char(prmDate,'D') not in (6,7) then
    --weekend...

    Furthermore, extracting day (in number format) from date and comparing whether it’s ‘6’ or ‘7’ seems like the only option to understand if it’s a weekday or weekend and that works just fine.

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