PL-SQL mass update help.

Question

I want to do a mass update with PL-SQL on a table with different values using one SQL QUERY.
Here is the table and some sample records
USER_TABLE
USER_ID | ACCOUNT_ID | ROLE | CREATED_TIMESTAMP |
101 | 999 | ADM | 01/20/2009
102 | 999 | SUB | 01/20/2009
103 | 888 | ADM | 01/20/2009
104 | 888 | SUB | 01/20/2009
SERVICE_TABLE
USER_ID | ACCOUNT_ID | .... | .... |
0 | 999 |
102 | 999 |
0 | 888 |
104 | 888 |
I want to populate SERVICE_TABLE where USER_ID=0.
USER_ID=0 in the SERVICE_TABLE for all User’s whose ROLE = ‘ADM’
For example in the SERVICE_TABLE,
where ACCOUNT_ID =999 and USER_ID = 0,
USER_ID should become 101
where ACCOUNT_ID =888 and USER_ID = 0,
USER_ID should become 103
Can someone please get me started, I am new to PL-SQL.

Answer 1

Ok,
That minds that you have more than one admin with de same account_ID (The scenario that I mencioned before).
This query will let you know wich ones are duplicated
select u.account_id, count(*)
from user_table u
where u.role = 'ADM'
group by u.account_id
having count(*) > 1;
select *
from user_table u1
where u1.account_id in
(select u.account_id
from user_table u
where u.role = 'ADM'
group by u.account_id
having count(*) > 1)
and u1.role = 'ADM';
could you post the results?
Regards,
Mike