SQL Join expression not supported

Question

Below is my query:

SELECT 
   UT.AgentName AS [Agent Name], 
   UT.TeamName AS Team, 
   Format(Now(),"Short Date") AS [As Of], 
   Sum(I.RegPointValue) AS Points
FROM 
   (SELECT 
       UU.AgentID, 
       (Nz(UU.LastName,'')+", "+Nz(UU.FirstName,'')) AS AgentName , 
       TT.TeamName 
    FROM 
       Users AS UU 
      INNER JOIN 
       Teams AS TT 
      ON UU.TeamID = TT.TeamID) AS UT 
 LEFT JOIN 
    (InfractionTypes AS I 
   INNER JOIN 
      (DateCodes AS D 
     INNER JOIN 
        AquiredInfractions AS AI 
     ON D.DateID = AI.DateID) 
   ON I.InfractionID = AI.InfractionID)
 ON UT.AgentID = AI.AgentID
WHERE (((D.DateValue)>=#4/1/2014#))
GROUP BY UT.TeamName, UT.AgentName, I.RegPointValue;

What this does is sum up all of the points that a person would get depending upon the attendance infractions that they have recieved. If I change the LEFT JOIN to INNER JOIN the query works but only returns the names of people that have received attendance infractions. But what I would like is for it to return the names of all people and have 0 for their points if they haven't received any.

The error that I get when I try to save or execute is Join expression not supported . I have been trying to get this to work for the last few hours by messing with the order of the joins but to no avail. Using MS-Access 2013.

Answer 1

You are missing some aliases.

Every inner query used as a table must be given an alias, and when joining them you must use that alias and only the selected columns on the join condition.

For example, add aliases to these lines:

...
    ON D.DateID = AI.DateID) AS SOMETHING_1
  ON I.InfractionID = AI.InfractionID) AS SOMETHING_2

etc