mysql-function to count days between 2 dates excluding weekends

Question

I\'ve searched through many examples , good ones I got :

1. Count days between two dates, excluding weekends (MySQL only)

2. How to count date dif

Answer 1

Had a similar issue, I used PHP to remove the weekends, need to know start day and number of days:

EG SQL:

  SELECT DAYOFWEEK(`date1`) AS `startday`, TIMESTAMPDIFF(DAY, `date1`, `date2`) AS `interval` FROM `table`

Then run the result through a PHP function:

    function noweekends($startday, $interval) {
        //Remove weekends from an interval
        $wecount = 0; $tmp = $interval;
        while($interval/7 > 1) { $interval-=7; $wecount++; }
        if($interval+$startday > 5) $wecount++;
        $interval = $tmp-($wecount*2);
        return $interval;
    }