Question

I am trying to learn SQL and wondering if something like this possible.

Select * 
from RDInfo RD
right outer join RDCollection RDC 
    on (RDC.RDInfoID = RD.RDInfoID and RDC.IsReceived = 1 
        and RDC.IsRenewed = 0) or -- RDInfoID not in table RDC

I am trying to get data from RDCollection if it satisfies 3 conditions written in the braces if not RDInfoID does not have a record in RDC table. This is in Sql 2005.

I hope i am clear. I am not sure if this is the right away. Thank you very much for the help. Thanks!

So here, All Employees may or may not have a record in Department, so in that case, how can

Answer 1

Just use a left join instead of a right.

Select *  
from RDInfo RD 
left outer join RDCollection RDC  
on (RDC.RDInfoID = RD.RDInfoID and RDC.IsReceived = 1 and RDC.IsRenewed = 0)

By using left outer join entries from RDInfo are returned regardless of whether or not there’s a match for RDCollection. When there isn’t a match the columns from RDCollection contain nulls.