Consider the foll. query
SELECT pinvtrn.*, LASTSALESBILL, SALESPCS, SALESMTS, LASTSALESBILL, LASTSALESDATE, SALESPARCELS, SALESRATE, SALESADAT, BILLS.DATE
FROM ((BILLS INNER JOIN PINVTRN ON (BILLS.CNO=PINVTRN.CNO) AND (BILLS.TYPE=PINVTRN.TYPE) AND (BILLS.VNO=PINVTRN.VNO)) INNER JOIN COMPMST ON...