Multiple Row Update From Similar Table

Question

I am attempting to update a table based on similar table if the Entry_Type is D and they have the same log_numbers. I have created queries to show me the results I want but am having some difficulities getting the update to happen. I am getting a single-row subquery returns more than one row error, but I would like to update all necessary rows.
Here is my sql...
UPDATE V.MASTER
SET (MODIFIED_BY, ENTRY_TYPE) = (
     SELECT MODIFIED_BY, ENTRY_TYPE
     FROM J.BACK)
     WHERE LOG_NUMBER IN
     (SELECT LOG_NUMBER FROM V.MASTER
     WHERE ENTRY_TYPE <> 'D' AND LOG_NUMBER = ANY
               (SELECT LOG_NUMBER FROM J.BACK
               WHERE ENTRY_TYPE = 'D'))
I would appreciate any assistance! Thanks!

Answer 1

You can also use correlated update. This one is from AskTom (http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1197999096334)
if you have the proper primary keys to assure uniqueness on S and C, this does it (i have the keys
noted in the creates)
ops$tkyte@ORA920> create table pgp_person
2 ( date_of_birth date,
3 update_by varchar2(10),
4 update_date date,
5 load_timestamp date,
6 person_num int );
Table created.
ops$tkyte@ORA920>
ops$tkyte@ORA920> create table ship_passenger
2 ( date_of_birth date,
3 person_num int,
4 voy_num int,
5 book_num int,
6 seq_num int,
7 primary key (person_num) );
Table created.
ops$tkyte@ORA920>
ops$tkyte@ORA920> create table pgp_cruise_history
2 ( voy_num int,
3 book_num int,
4 seq_num int,
5 matched_ind int,
6 primary key(voy_num,book_num,seq_num) );
Table created.
ops$tkyte@ORA920>
ops$tkyte@ORA920> update ( select p.date_of_birth dob1, s.date_of_birth dob2,
2 p.update_by, p.update_date, p.load_timestamp
3 from pgp_person p, pgp_cruise_history c, ship_passenger s
4 where p.person_num = s.person_num
5 and s.voy_num = c.voy_num
6 and s.book_num = c.book_num
7 and s.seq_num = c.seq_num
8 and c.matched_ind is not null
9 and s.date_of_birth <> p.date_of_birth )
10 set dob1 = dob2,
11 update_by = 'sdm18649',
12 update_date = trunc(sysdate),
13 load_timestamp = sysdate;
0 rows updated.