付首昕 ORACLE 10 学习笔记 第3课 命令。

ORACLE 10 学习笔记-第3课-命令。
1.view 限制
create or replace view my_view01
as select * from emp
with check option
/
2.synonym 同义词
create synonym dept for scott.dept;
select * from dept;
3.sysdba 公共
drop synonym dept;
create public synonym dept for scott.dept;
desc dba_synonyms
4.sequence 序列
create sequence myseq
start with 1
increment by 1
order
nocycle;
select myseq.nextval from dual;
select myseq.currval from dual;
5.
desc dba_sequences
select sequence_name, sequence_owner from dba_sequences;