Помогите с query

[Bega]

что вроде этого пойдет ?:
Query q;
QueryBuildDataSource qbr, qbr2, qbr3;
;
qbr = q.addDataSource(tablenum(Table1));
qbr2 = qbr.addDataSource(tablenum(Table2));
qbr2.addLink(tablenum(Table1, ItemId), tablenum(Table2, ItemId));
qbr2.joinMode(JOINMODE::ExistsJoin);
qbr3 = qbr.addDataSource(tablenum(Table3));
qbr3.addLink(tablenum(Table1, ItemId), tablenum(Table3, ItemId));
qbr3.joinMode(JOINMODE::ExistsJoin);