EnsurepassQUESTION 161 All the database users are presently connected to the database instance and working. The HR user has opened three database sessions and executed the following command in one of his sessions:   SQL> UPDATE persons SET ccode='U031' WHERE ccode='U029'; 123 rows updated. SQL> DELETE FROM persons WHERE exp='Y'; 3 rows deleted.   The SYS user opens a new session after HR executed the above commands. Which sessions can see the effect of the UPDATE and DELETE Read more [...]