oracle怎么查看用户锁了哪张表

① 查看用户锁表 select sess.sid, sess.serial#, lo.oracle_username, lo.os_user_name, ao.object_name, lo.locked_mode from v$locked_object lo, dba_objects ao, v$session sess where ao.object_id = lo.object_id and lo.session_id = sess.sid ② 解锁语句 alter system kil

oracle sql developer 如何同时打开多张表: 步骤: 1.打开oracle sql developer 2."工具"---->"首选项(p)"---->"数据库"------>"对象查看器"---->选中"自动冻结对象查看器窗口(A)" 如下图所示:

本文转自:http://www.cnblogs.com/QDuck/archive/2010/08/11/1797225.html 1.查看所有用户:   select * from dba_users;   select * from all_users;   select * from user_users; 2.查看用户或角色系统权限(直接赋值给用户或角色的系统权限):   select * from dba_sys_privs;   select * from user_sys_priv

转自:https://blog.csdn.net/lx870576109/article/details/78336695 把每一个知识点进行积累:Oracle数据库中将查询一张表的结果添加到另一张表中 insert into material_tc(matno, mname, xlmname, lmname,tkdat,comdat,tc,id) select a.matno, a.mname, a.xlnmame, a.demo2 ,11,11,11,1 from log_material

//lock_date是被锁住时间,如果为空证明这个用户没有被锁住 select username,lock_date from dba_users where username='GFMIS';  //GFMIS是数据库的用户 //给用户解锁 ALTER USER gfmis ACCOUNT UNLOCK;

SQL> drop user test cascade;drop user test cascade*ERROR at line 1:ORA-01940: cannot drop a user that is currently connected SQL> select sid,serial# from v$session where username='TEST'; SID    SERIAL#---------- ----------      2558        522     

--选择部门中30的雇员SELECT * from emp where DEPTNO=30;--列出所有办事员的姓名.部门.编号--采用内连接方式,也就是等值链接,也是最常用的链接SELECT ename,empno,dname from emp e INNER JOINdept d on e.deptno=d.deptno where job='CLERK';--找出佣金高于薪金的雇员select * from emp where comm>sal;--找出佣金高于薪金60%的雇员select

面向对象方面考虑用户信息就是用户本身,用户名和密码只是登陆钥匙性能方面考虑登陆验证的时候列较少,查询速度快.安全性考虑防止在查询用户信息时,把密码也直接查询出来,会容易被攻击和进行恶意操作.

SELECT * FROM ( SELECT JBXX.*,row_number() OVER (partition BY WRYMC ORDER BY WRYMC,CJSJ DESC) R FROM T_WRY_JBXX  JBXX ) A WHERE R=1