nAvgSalary := oCn:QueryResult( "SELECT AVG(SALARY) FROM customer" )
cantprod := oCn:Rowset( "SELECT COUNT( * ) AS hay FROM PREVLAVADO" ):hay
oRs:= oCn:Rowset( "SELECT COUNT( * ) AS hay FROM PREVLAVADO" )
cantprod := oRs:hay
oRs:= oCn:Rowset( "SELECT COUNT( * ) FROM PREVLAVADO" )
cantprod := oRs: ...