Sql LEFT OUTER JOIN with WHERE clause

Question

I have two tables:

Request:

 RequestID | Msg
----------------
    5  | abc
    6  | def
    7  | ghi
    8  | jkl

Answer 1

You need use an NOT IN Query Statement like this

Select * 
From Request 
Where RequestID not in 
    (Select RequestID 
    From RequestStatus 
    Where StatusID = 2)

or

Select * 
From Request r 
left join requestStatus rs on r.requestID = rs.requestID 
Where r.RequestID not in 
    (Select RequestID 
    From RequestStatus 
    Where StatusID = 2)