Query 1 - Inserts a row in table1.
Query 2 - Fetches the primary key id for the inserted record (by Query 1) in table1.
Query 3 - Uses the id fetched by the second query as foreign key to insert values in table 2.
Can I put all 3 queries in one transaction?
If I write like
execute all three queries
The problem I would be facing is if the third query will fail as the commit happens at last. (As it requires the id by query 2). Please help.
Yes you can put all SQL statements in one transaction, and each SQL will see the changes done by other sqls before it.
Actually, isolation level changes this behavior a bit. A transaction will always see its own changes. If you use read uncommitted, transactions can see other transactions changes. If you use read committed or repeatable read, transaction will not be able to see other transactions changes unless the transaction is committed.
Joined: Mar 10, 2011
Thanks Jayesh. Would appreciate if you could elaborate on transactions with read uncommited with an example. Thanks a lot.