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

Try this

SELECT *
FROM Request R
  LEFT JOIN RequestStatus RS ON R.RequestID  =  RS.RequestID   
  WHERE RS.StatusID <> 2 OR RS.RequestID IS NULL

SQL FIDDLE