Access 2003 Query Dilemma

Question

I am, having difficulty with multiple values returning for each user. I have tried variations of Select Distinct to no avail. I need my code to only retun one value per userID.

SELECT Roster.UserID, 
    EventLog.Type, 
    IIf([EventLog]![LogType] Like "Acc*" And [EventLog]![Action] Like "Wri*",[EventLog]![Date],Date()-183) AS [Review Date]
FROM EventLog 
INNER JOIN Roster 
    ON EventLog.UserID = Roster.UserID
GROUP BY Roster.UserID, 
    EventLog.Type, 
    IIf([EventLog]![LogType] Like "Acc*" And [EventLog]![Action] Like "Wri*",[EventLog]![Date],Date()-183)
HAVING (((EventLog.Type) Like "Att*"));

The code is returning both values from the IIf when they meet the first criteria. How can I limit to one or the other?

Answer 1

You're getting multiple values per user because you've listed multiple fields in your GROUP BY clause:

    GROUP BY Roster.UserID, 
        EventLog.Type, 
        IIf([EventLog]![LogType] Like "Acc*" And 
[EventLog]![Action] Like "Wri*",[EventLog]![Date],Date()-183)

I'm not sure why you're grouping at all, as you're not performing any aggregate functions. Would SELECT DISTINCT work?

Answer 2

Thanks for the feedback folks. Basedon what Beth replied and cleaning up my tables and querys to send a copy of the dBasethe problem seemed to work itself out with a small addition of code.

SELECT Roster.UserID, 
EventLog.Type, 
Max(IIf(EventLog!LogType Like "Acc*" And EventLog!Action Like "Wri*",EventLog!Date,Date()-183)) AS [Review Date]
FROM EventLog 
INNER JOIN Roster 
ON EventLog.UserID = Roster.UserID
GROUP BY Roster.UserID,
EventLog.Type
HAVING (((EventLog.Type) Like "Att*"));

The clean up of the multi fields from Beth worked a treat!!!