This query works:
SELECT p.AcntNumber, p.Name, d.FromDate
FROM Daysheet AS d
INNER JOIN Patient AS p ON d.AcntNumber=p.AcntNumber
But this does not:
SELECT p.AcntNumber, p.Name, d.FromDate, c.CPT
FROM Daysheet AS d
INNER JOIN Patient AS p ON d.AcntNumber=p.AcntNumber
INNER JOIN Charge AS c ON...