啓動數據庫的步驟

1.登錄到 oracle

su - oracle

2.啓動 監聽

$ lsnrctl start

3. 啓動數據庫

$ sqlplus /nolog

sql>conn / as sysdba

sql>startup

4.解鎖hr用戶

sql> alter user hr identified by hr account unlock;

5.登錄到 hr用戶

sql>conn hr/hr

6.查看有哪些表

sql>select table_name from user_tables;

7.查看錶結構

sql> desc departments

8.看具體內容

sql>select * from departments;