3、SQL>connect / as sysdba ;(as sysoper)或 connect internal/oracle AS SYSDBA ;(scott/tiger) conn sys/change_on_install as sysdba;
4、SQL>startup; 启动数据库实例
5、查看当前的所有数据库: select * from v$database; select name from v$database;
6、desc v$databases; 查看数据库结构字段
7、怎样查看哪些用户拥有SYSDBA、SYSOPER权限: SQL>select * from V_$PWFILE_USERS; Show user;查看当前数据库连接用户
8、进入test数据库:database test;
9、查看所有的数据库实例:select * from v$instance; 如:ora9i
10、查看当前库的所有数据表: SQL> select TABLE_NAME from all_tables; select * from all_tables; SQL> select table_name from all_tables where table_name like '%u%'; TABLE_NAME ------------------------------ _default_auditing_options_