mysql date_add 2 times in procedure

Question

i want to use Date_add 2 times in a procedure, but it returns 0 rows (while it should return rows)

Here is the procedure

 select av.*, ap.*,c.* from tbl_available av 
 left join tbl_appointment ap on av.avHours = ap.appointmenttime 
 and ap.calendarid = kalenderId 
 and ap.appointmentdate = DATE_ADD(dag, INTERVAL 6 DAY)
 left join tbl_client c on ap.clientid = c.clientid
 where av.avCalendarId = KalenderId 
 and av.avDays = DayOfweek(DATE_ADD(dag, INTERVAL 6 DAY)) 
 order by avHours;

it works without the date_add

thanks in advance!

//edit

What i have now:

select av.*, ap.*,c.*, ab.absentid from tbl_available av 
left join tbl_appointment ap on av.avHours = ap.appointmenttime 
and ap.calendarid = kalenderId 
and ap.appointmentdate BETWEEN dag AND DATE_ADD(dag, INTERVAL 6 DAY)
and (av.avDays = DayOfweek(ap.appointmentdate) OR ap.appointmentdate IS NULL)
left join tbl_client c on ap.clientid = c.clientid
left join tbl_absent ab on av.avHours = ab.ababsent
and ab.abHoliday = dag
and ab.abCalendarID = kalenderId
where av.avCalendarId = kalenderId 
order by avDays,avHours;

But the ab.absentid is not fetched, why is that? :(

Answer 1

I'm not sure exactly what you want, but for the whole week, try something like:

select av.*, ap.*,c.* from tbl_available av 
left join tbl_appointment ap on av.avHours = ap.appointmenttime 
and ap.calendarid = kalenderId 
and ap.appointmentdate BETWEEN dag AND DATE_ADD(dag, INTERVAL 6 DAY)
and (av.avDays = DayOfweek(ap.appointmentdate) OR ap.appointmentdate IS NULL)
left join tbl_client c on ap.clientid = c.clientid
where av.avCalendarId = KalenderId 
order by avHours;

I'm using BETWEEN to specify the date range for ap.appointmentdate. The av.avDays is changed to either correlate to ap.appointmentdate or also show rows with no appointment (assumed this behavior because you have a LEFT JOIN on tbl_appointment). I have left off DayOfweek(dag) ... because you are looking at a whole week so this is redundant.