PostgreSQL PHP最后一个id值从不同的表到另一个表

Question

Im trying to create a table which only will have the serial and 9 int foreign keys.

Is there a way to insert the last id from other tables to this table? i been trying with RETURNING, nextval()-1, currval(),ordering results by timestamp but nothing seems to work, i just cant get the ids values from the other tables inserted into the table. even tried this simple set of queries for each table to update one by one of the table columns

  $lst="SELECT id from table1 ORDER BY timestamp DESC limit 1";
  $lst_res=pg_query($conn,$lst);
$sql_eq_bat_up="UPDATE table9 set table1_id='$lst_res[id]'";
  $do_up_tbl1=pg_query($conn,$sql_eq_bat_up);

i been doing some research but had no luck, im using postgreSQL 9.5 and php for this, i hope you can help me thanks.