ORA-00918 issue joining tables for Update

Question

Hi,
I have 2 tables : PAR_SPEC_OPS and T_PAR and I'm trying to update 2 columns in the first one with values from the second table.
Here's my script :
Update
Select membership_id, membership_status
From Par_Spec_Ops P,T_Par T
Where P.Tracking_ID=T.Tracking_ID
Set P.membership_id = T.membership_id,
P.membership_status = T.membership_status;
Running this gives me ORA-00918: column ambiguously defined. I've looked this up and it says it happens when there's a common column in the 2 tables and I'm not using prefixes, but as you can see from my command, I'am using prefixes. I have tried with and without alias but I get the same error.
Do you guys have any ideas?
Thanks and regards,
Ionut
Edited by: 837311 on Nov 8, 2011 4:24 AM

Answer 1

Does this help?
SQL> create table t_par
2 (membership_id number,
3 membership_status varchar2(10),
4 tracking_id number
5 );
Table created.
SQL>
SQL> create unique index t_par_ix1 on t_par(tracking_id);
Index created.
SQL>
SQL> create table par_spec_ops
2 (membership_id number,
3 membership_status varchar2(10),
4 tracking_id number
5 );
Table created.
SQL>
SQL> create unique index tracking_id_ix1 on par_spec_ops(tracking_id);
Index created.
SQL>
SQL> insert into t_par values(111,'new',1111);
1 row created.
SQL> insert into t_par values(222,'new',2222);
1 row created.
SQL> insert into t_par values(333,'new',3333);
1 row created.
SQL>
SQL> insert into par_spec_ops values(111,'expired',1111);
1 row created.
SQL> insert into par_spec_ops values(222,'expired',2222);
1 row created.
SQL>
SQL> Select t.membership_id, t.membership_status,p.membership_id,p.membership_status
2 From T_Par T left outer join par_spec_ops p using(tracking_id)
3 ;
MEMBERSHIP_ID MEMBERSHIP MEMBERSHIP_ID MEMBERSHIP
     111 new          111 expired
     222 new          222 expired
     333 new
SQL>
SQL> Update
2 (
3 Select p.membership_id as p_m_id,
4      t.membership_id as t_m_id,
5      t.membership_status t_m_stat,
6      p.membership_status p_m_stat
7 From Par_Spec_Ops P,T_Par T
8 Where P.Tracking_ID=T.Tracking_ID
9 )
10 Set p_m_id = t_m_id,
11 p_m_stat = t_m_stat;
2 rows updated.
SQL>
SQL> Select t.membership_id, t.membership_status,p.membership_id,p.membership_status
2 From T_Par T left outer join par_spec_ops p using(tracking_id)
3 ;
MEMBERSHIP_ID MEMBERSHIP MEMBERSHIP_ID MEMBERSHIP
     111 new          111 new
     222 new          222 new
     333 new
SQL>