Table Joins in ExecuteSQL

[aguest]

Hi, I can't get the script below to return anything other than ? once I've joined the tables. Can anyone see why?

TIA

ExecuteSQL ( "
            SELECT b.ClearLearningRating, count(*)
            FROM LessonObservations a
            INNER JOIN Observations b on a.[pk] = b.[fk_TeacherEvaluations]
            WHERE a.obsdate >=?
            AND a.obsdate <= ?
            AND a.YearGroup = ?
            GROUP BY b.ClearLearningRating "

; "|"; "¶" ;

$Repstartdate;
$Rependdate;
$RepYearGrp )

[Wim Decorte]

"?" always means a syntax error.

Do your fields really have square brackets in their names?

[aguest]

No but even without the square brackets I'm getting the ?. I can't figure out where the syntax error is.