自己常用的一些ORACLE命令

select * from all_users; ##查看所有用户

select name from v$database; ##查看当前数据库

database new; ##进入new数据库

select * from v$instance; ##查看所有的数据库实例

shutdown immediate ##关闭数据库

alter user sys identified by new_password; ##更改用户密码

select username,password from dba_users; ##查看当实例中的用户和密码

show parameter control_files; ## 查看控制文件;

select member from v$logfile; ##查看日志文件

show parameter ; ## 查看数据库参数

select * from user_role_privs; ##查看当前用户的角色

select username,default_tablespace from user_users; ##查看当前用户的缺省表空间

alter user system identified by [password] ##修改用户的密码

ALTER USER "SCOTT" ACCOUNT UNLOCK ##解锁SCOTT用户

show parameter processes; ##查看最大会话数

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

查看表结构：desc all_tables;

创建用户并赋予权限

###------------------------创建用户并赋予权限-------------------------------####-

create user newshell

identified by "newshell"

default tablespace TS_MPSS_DATA

temporary tablespace TEMP;

给用户赋予权限

grant connect to newshell;

grant resource,create session to newshell; 开发角色

grant create procedure to dbuser； ＃这些权限足够用于开发及生产环境

给用户授权

grant dba to newshell;--授予DBA权限

grant unlimited tablespace to newshell;--授予不限制的表空间

grant select any table to newshell;--授予查询任何表

grant select any dictionary to newshell;--授予 查询 任何字典

删除用户

drop user newshell cascade;

建表空间

###---------------------------------建表空间------------------------------------####-

================建立表空间============================

CREATE TABLESPACE "TS_NEWSHELL_DATA"

LOGGING

DATAFILE '/hack/data/ts_hack_data.dbf' SIZE 1024M

EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO

=====================================================

=================建立临时表空间============================

CREATE

TEMPORARY TABLESPACE "SWVIP" TEMPFILE '/app/oracle/oradata/

sworacle/SWVIP.dbf' SIZE 5M EXTENT MANAGEMENT LOCAL UNIFORM

SIZE 1M

=====================================================

create tablespace TS_NEWSHELL_DATA datafile '/mpss/data/ts_hack_data.bdf ' size 1024m autoextend on ; ###autoextend on 自动扩展

###------------------------------------------------------------------------------------####-

查看表空间

###----------------------------查看表空间大小------------------------------------####-

SELECT D.TABLESPACE_NAME "Name",

TO_CHAR(((((A.BYTES - DECODE(F.BYTES, NULL, 0, F.BYTES)) / 1024 / 1024)) /(A.BYTES / 1024 / 1024))*100,'99,990.9') "used(%)",

TO_CHAR((DECODE(F.BYTES, NULL, 0, F.BYTES) / 1024 / 1024),'999,990.9') "Free (M)"

FROM SYS.DBA_TABLESPACES D, SYS.SM$TS_AVAIL A, SYS.SM$TS_FREE F

WHERE D.TABLESPACE_NAME = A.TABLESPACE_NAME

AND F.TABLESPACE_NAME (+) = D.TABLESPACE_NAME;

###--------------------------------------------------------------------------------------####-

SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS,SPACE-NVL(FREE_SPACE,0) "USED_SPACE(M)",

ROUND((1-NVL(FREE_SPACE,0)/SPACE)*100,2) "USED_RATE(%)",FREE_SPACE "FREE_SPACE(M)"

FROM

(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS

FROM DBA_DATA_FILES

GROUP BY TABLESPACE_NAME) D,

(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) FREE_SPACE

FROM DBA_FREE_SPACE

GROUP BY TABLESPACE_NAME) F

WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

UNION ALL --if have tempfile

SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS,

USED_SPACE "USED_SPACE(M)",ROUND(NVL(USED_SPACE,0)/SPACE*100,2) "USED_RATE(%)",

NVL(FREE_SPACE,0) "FREE_SPACE(M)"

FROM

(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS

FROM DBA_TEMP_FILES

GROUP BY TABLESPACE_NAME) D,

(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES_USED)/(1024*1024),2) USED_SPACE,

ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACE

FROM V$TEMP_SPACE_HEADER

GROUP BY TABLESPACE_NAME) F

WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+) ;

查看表空间物理文件的名称及大小;

###--------------------表空间物理文件的名称及大小------------------------####-

select tablespace_name, file_id, file_name,

round(bytes/(1024*1024),0) total_space

from dba_data_files

order by tablespace_name;

###------------------------------------------------------------------------------------####-

查看数据文件放置的路径

###------------------------------------------------------------------------------------####-

SQL> col file_name format a50

SQL> select tablespace_name,file_id,bytes/1024/1024,file_name from dba_data_files order by file_id;

###------------------------------------------------------------------------------------####-

查看数据库库对象

select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;

用系统管理员，查看当前数据库有几个用户连接：

SQL> select username,sid,serial# from v$session;

扩表空间

###------------------------------------------------------------------------------------####-

alter tablespace G000 add datafile '/dev/vgbilling/rg000_lv03' SIZE 7500m;

给表G000增加一个7500m的逻辑卷'/dev/vgbilling/rg000_lv03'

###------------------------------------------------------------------------------------####-

检查被长时间锁的对象

###------------------------------------------------------------------------------------####-

SQL>select a.session_id,a.process,a.locked_mode,b.object_name,b.object_type,b.status from v$locked_object a,dba_objects b where a.object_id=b.object_id;

###------------------------------------------------------------------------------------####-

本文出自 “红苕藤” 博客，请务必保留此出处http://newshell.blog.51cto.com/1300968/621035