NIIT培训期间学习oracle的笔记,包括了select,delete,update,insert,PL/SQL,trigger,sequence,grant,revoke等-The record about Oracle，include select,delete,update,insert,PL/SQL,trigger,sequence,grant,revoke and so on.

PL/SQL块中只能直接嵌入SELECT,DML(INSERT,UPDATE,DELETE)以及事务控制语句(COMMIT,ROLLBACK,SAVEPOINT),而不能直接嵌入DDL语句(CREATE,ALTER,DROP)和DCL语句(GRANT,REVOKE)-PL/SQL block can only be embedded directly in the SELECT, DML (INSERT, UPDATE, DELETE), and transaction control stat