Oracle日常操作小常识(持续更新)

如何查看各个表空间占用磁盘情况?

SQL> col tablespace format a20 SQL> select b.file_id 文件ID号, b.tablespace_name 表空间名, b.bytes 字节数, (b.bytes-sum(nvl(a.bytes,0))) 已使用, sum(nvl(a.bytes,0)) 剩余空间, sum(nvl(a.bytes,0))/(b.bytes)*100 剩余百分比 from dba_free_space a,dba_data_files b where a.file_id=b.file_id group by b.tablespace_name,b.file_id,b.bytes order by b.file_id

查看本用户下的各种对象的SQL脚本 表:   

select * from cat;   select * from tab;   select table_name from user_tables;

视图:   select text from user_views where view_name=upper('&view_name');

索引:   select index_name,table_owner,table_name,tablespace_name,status from user_indexes order by table_name;

触发器:   select trigger_name,trigger_type,table_owner,table_name,status from user_triggers;

快照:   select owner,name,master,table_name,last_refresh,next from user_snapshots order by owner,next;

同义词:   select * from syn;

序列:   select * from seq;

数据库链路:   select * from user_db_links;

约束限制:   select TABLE_NAME,CONSTRAINT_NAME,SEARCH_CONDITION,STATUS from user_constraints;

本用户读取其他用户对象的权限:   select * from user_tab_privs;

本用户所拥有的系统权限:   select * from user_sys_privs;

用户:   select * from all_users order by user_id;

表空间剩余自由空间情况:   select tablespace_name,sum(bytes)

总字节数,max(bytes),count(*) from dba_free_space group by tablespace_name;

数据字典:   select table_name from dict order by table_name;

锁及资源信息:   select * from v$lock;

不包括DDL锁

数据库字符集:   select name,value$ from props$ where name='NLS_CHARACTERSET';

inin.ora参数:   select name,value from v$parameter order by name;

SQL共享池:   select sql_text from v$sqlarea;

数据库:   select * from v$database

控制文件:   select * from V$controlfile;

重做日志文件信息:   select * from V$logfile;

来自控制文件中的日志文件信息:   select * from V$log;

来自控制文件中的数据文件信息:   select * from V$datafile;

NLS参数当前值:   select * from V$nls_parameters;

ORACLE版本信息:   select * from v$version;

描述后台进程:   select * from v$bgprocess;

查看版本信息:   select * from product_component_version;

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