问题
Can I rollback changes to the database using implicit savepoints? I ended up making changes(INSERTs) through my Java code that I would want to revert back.
回答1:
You can use a SAVEPOINT as outlined at How to COMMIT, ROLLBACK Oracle Transactions.
Here's the SAVEPOINT snippet from it...
SAVEPOINT
Specify a point in a transaction to which later you can roll back.
Example
insert into emp (empno,ename,sal) values (109,’Sami’,3000);
savepoint a;
insert into dept values (10,’Sales’,’Hyd’);
savepoint b;
insert into salgrade values (‘III’,9000,12000);
Now if you give
rollback to a;
Then row from salgrade table and dept will be roll backed. Now you can commit the row inserted into emp table or rollback the transaction.
If you give
rollback to b;
Then row inserted into salgrade table will be roll backed. Now you can commit the row inserted into dept table and emp table or rollback to savepoint a or completely roll backed the transaction.
If you give
rollback;
Then the whole transactions is roll backed.
If you give
commit;
Then the whole transaction is committed and all savepoints are removed.
回答2:
Have a look at Using Oracle Flashback Technology. Assuming your database is already set up for it then you can flashback to a time before the inserts. Though be careful if other users are also updating this table. Also, it's ony recommended if you've made a mistake and will manually flash it back, I wouldn't build this in to any code to automatically do so.
来源：https://stackoverflow.com/questions/9318794/rollback-database-changes-using-implicit-savepoints-oracle