TCL 交易控制語言

參考資料:(http://pclevinblog.pixnet.net/blog/post/314561194-oracle-sql-%E7%9A%84%E5%88%86%E9%A1%9Edml%E3%80%81dcl%E3%80%81ddl)

COMMIT - save work done SAVEPOINT - identify a point in a transaction to which you can later roll back ROLLBACK - restore database to original since the last COMMIT SET TRANSACTION - Change transaction options like isolation level and what rollback segment to use