target.setSql(sql);
for(int i=0;i<arrSelects.length;i++) {
arrSelects[i].getFroms();
Column[] froms = arrSelects[i].getFroms();
if(froms.length>1) throw new DatabaseException("can only work with single tables yet",null,sql,null);
executeSingle(pc,arrSelects[i],getSingleTable(pc, froms[0]),target,arrSelects.length>1?-1:maxrows,sql,
orders.length>0);
}
// Order By