SELECT *, switch(rec is null,"C",rec>=94,"A",rec<94,"B") as ClassData
FROM (SELECT * FROM dbo_collar C INNER JOIN dbo_listFile L ON C.hole_id=L.holeID) X LEFT JOIN dbo_ListPDF_Logging Y ON X.hole_id =Y.hole_id
SELECT *, switch(rec is null,"C",rec>=94,"A",rec<94,"B") as ClassData
FROM (SELECT * FROM dbo_collar C INNER JOIN dbo_listFile L ON C.hole_id=L.holeID) X LEFT JOIN dbo_ListPDF_Logging Y ON X.hole_id =Y.hole_id