灾备用Oracle语句备查

1. 查看数据库的归档模式及闪回是否启用    
        select log_mode,open_mode,flashback_on from V$database;
2.查看实例状态
        select status from V$instance;
3.卸载数据库实例
        shutdown immediate;
4.启动数据库实例
        startup mount;
5.更改数据库读写状态
    alter database activate standby database;
6.查询数据库版本
    select * from V$version;
7.查询实例名
    select instance_name from V$instance;
8.连接数据库
    conn username/password@databasename (as sysdba)
9.查询所有表名
    select distinct table_name from user_tab_columns; //系统内置表
10.创建表空间
    create tablespace news_tablespace datafile 'F:\...' size 500M;
11.给表空间授权
    grant username to tablespace;
12.创建表
   create table student(sid number,sname varchar2(30));
13.设置自动提交
    set autocommit on;
14.开启自动归档
    quit;sqlplus/nolog;select status from V$instance;
     shutdown immediate;    //关闭实例
    startup mount;
    archive log list;
    alter database archivelog;
    archive log list;alter system set log_archive_dest_1='location=E:\oracle\product';
    alter system set log_archive_dest_1='location=/home/logdata'; [Linux下设置归档路径]

15.查看表空间
    select username,default_tablespace from dba_users;
16.插入10000条数据
declare aa NUMBER(10,0):=1;
begin
  loop 
  insert into student values (aa,'aa');
  aa:=aa+1;
  exit when aa>1000;
  end loop;
  end;

17.取前100条数据