Question

I am trying to get Dates from RepDailyInfo table when the RepDailyCollection.IsReceived = 0 and when the RepDailyCollection does have a record for that particular RepDailyInfoID. Is this possible in sql server 2005?

Select distinct RepDailyInfo.Date 
from RepDailyInfo 
left outer join RepDailyCollection c 
    on c.RepDailyInfoID = RepDailyInfo.RepDailyInfoID
where c.IsReceived = 0 
    or c.IsReceived = null

Answer 1

Move the conditions into the ON clause of the join, because otherwise you need the join to find a row for the row to be referred to in the WHERE clause:

Select distinct RepDailyInfo.Date 
from RepDailyInfo 
left outer join RepDailyCollection c 
    on c.RepDailyInfoID = RepDailyInfo.RepDailyInfoID
    and (c.IsReceived = 0 or c.IsReceived is null)

Also note the use of brackets around the or, which are needed in SQL because “or” takes precedence over “and” and without brackets you end up with “(A and B) or C”