Oracle数据库常见命令

1，查询数据库一共有多少张表
select count(*) from user_tables

2，数据库锁表情况
SELECT /*+ rule */
   s.username,
   decode(l.type, 'TM', 'TABLE LOCK', 'TX', 'ROW LOCK', NULL) LOCK_LEVEL,
   o.owner,
   o.object_name,
   o.object_type,
   s.sid,
   s.serial#,
   s.terminal,
   s.machine,
   s.program,
   s.osuser
FROM v$session s, v$lock l, dba_objects o
WHERE l.sid = s.sid
   AND l.id1 = o.object_id(+)
   AND s.username is NOT NULL
   and object_name is not null
   and decode(l.type, 'TM', 'TABLE LOCK', 'TX', /*'ROW LOCK',*/ NULL) is not null;

3，快速导表SQL:create table workforce.表名 as select * from spsdev.表名

4，PL/SQL杀进程 alter system kill session(sid,serial#)