>SELECT Invoice.Numero > FROM Invoice > WHERE Invoice.NoClient IN (5,44,52,54,55,57,58,59,60,61,62,63,64,65,66,67,68,70,71,72,73,69,74,75,76,77,78,80) >>
>SELECT Invoice.Numero > FROM Invoice > WHERE Invoice.NoClient2 IN (79) >>
>SELECT Invoice.Numero > FROM Invoice > WHERE Invoice.NoClient IN (5,44,52,54,55,57,58,59,60,61,62,63,64,65,66,67,68,70,71,72,73,69,74,75,76,77,78,80) >>
>SELECT Invoice.Numero > FROM Invoice > WHERE Invoice.NoClient2 IN (5,44,79) >>
SELECT Invoice.Numero FROM Invoice WHERE Invoice.NoClient = Invoice.NoClient2 AND Invoice.NoClient IN (5,44,52,54,55,57,58,59,60,61,62,63,64,65,66,67,68,70,71,72,73,69,74,75,76,77,78,80) AND Invoice.NoClient2 IN (79)Update: Not sure I got you right. Discard.