Adding two datasources for different tables to same query object for a SysQueryForm

 qbdsProject = _qbdsHeader.addDataSource(tableNum(ProjTable));
 qbdsProject.relations(true);
 qbdsProject.joinMode(JoinMode::ExistsJoin);

        projAdjustmentSelect = queryRun.query().dataSourceTable(tableNum(ProjTable));
        elements = projAdjustmentSelect.rangeCount();
        for (i = 1; i <= elements; i++)
        {
            projAdjustmentSelectRange = projAdjustmentSelect.range(i);
            qbr = qbdsProject.addRange(projAdjustmentSelectRange.field());
            qbr.value(projAdjustmentSelectRange.value());
        }
        

        }

       

       // Code I added to set the data source to new table and filter out by new field in the joined table of the sys query form
        qbdsProjPostedTrans = _qbdsHeader.addDataSource(tableNum(ProjPostedTransTable));
        qbdsProjPostedTrans.relations(true);
        qbdsProjPostedTrans.joinMode(JoinMode::ExistsJoin);

        projPostedTransTable = queryRun.query().dataSourceTable(tableNum(ProjPostedTransTable));
        elements = projPostedTransTable.rangeCount();
        for (i = 1; i <= elements; i++)
        {
            projPostedTransTableRange =  projPostedTransTable.range(i);
            qbr =  qbdsProjPostedTrans.addRange( projPostedTransTableRange.field());
            qbr.value( projPostedTransTableRange.value());