PLSQL查询oracle数据库对象

it2024-10-11  25

dictionary 全部数据字典表的名称和解释,它有一个同义词dict,dict_column 全部数据字典表里字段名称和解释

如果我们想查询跟索引有关的数据字典时,可以用下面这条SQL语句:select * from dictionary where instr(comments,'index')>0;如果我们想知道user_indexes表各字段名称的详细含义,可以用下面这条SQL语句:select column_name,comments from dict_columns where table_name='USER_INDEXES';依此类推,就可以轻松知道数据字典的详细名称和解释,不用查看ORACLE的其它文档资料了。

下面按类别列出一些ORACLE用户常用数据字典的查询使用方法。 1、用户查看当前用户的缺省表空间select username,default_tablespace from user_users;查看当前用户的角色select * from user_role_privs;查看当前用户的系统权限和表级权限select * from user_sys_privs;select * from user_tab_privs;

2、表查看用户下所有的表select * from user_tables;查看名称包含log字符的表select object_name,object_id from user_objects where instr(object_name,'LOG')>0;查看某表的创建时间select object_name,created from user_objects where object_name=upper('&table_name');查看某表的大小select sum(bytes)/(1024*1024) as "size(M)" from user_segments where segment_name=upper('&table_name'); 查看放在ORACLE的内存区里的表select table_name,cache from user_tables where instr(cache,'Y')>0;

3、索引查看索引个数和类别select index_name,index_type,table_name from user_indexes order by table_name;查看索引被索引的字段select * from user_ind_columns where index_name=upper('&index_name');查看索引的大小select sum(bytes)/(1024*1024) as "size(M)" from user_segmentswhere segment_name=upper('&index_name');

4、序列号查看序列号,last_number是当前值select * from user_sequences;

5、视图查看视图的名称select view_name from user_views;查看创建视图的select语句set view_name,text_length from user_views;set long 2000; 说明:可以根据视图的text_length值设定set long 的大小select text from user_views where view_name=upper('&view_name');

6、同义词查看同义词的名称select * from user_synonyms;

7、约束条件查看某表的约束条件select constraint_name, constraint_type,search_condition, r_constraint_namefrom user_constraints where table_name = upper('&table_name');select c.constraint_name,c.constraint_type,cc.column_namefrom user_constraints c,user_cons_columns ccwhere c.owner = upper('&table_owner') and c.table_name = upper('&table_name')and c.owner = cc.owner and c.constraint_name = cc.constraint_nameorder by cc.position;

8、存储函数和过程查看函数和过程的状态select object_name,status from user_objects where object_type='FUNCTION';select object_name,status from user_objects where object_type='PROCEDURE';查看函数和过程的源代码select text from all_source where owner=user and name=upper('&plsql_name');

查看数据库的SQL

1、查看表空间的名称及大小select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_sizefrom dba_tablespaces t, dba_data_files dwhere t.tablespace_name = d.tablespace_namegroup by t.tablespace_name;

2、查看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_spacefrom dba_data_filesorder by tablespace_name;

3、查看回滚段名称及大小select segment_name, tablespace_name, r.status,(initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent,max_extents, v.curext CurExtentFrom dba_rollback_segs r, v$rollstat vWhere r.segment_id = v.usn(+)order by segment_name ;

4、查看控制文件select name from v$controlfile;

5、查看日志文件select member from v$logfile;

6、查看表空间的使用情况select sum(bytes)/(1024*1024) as free_space,tablespace_namefrom dba_free_space group by tablespace_name;SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,(B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE CWHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME;

7、查看数据库库对象select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;

8、查看数据库的版本Select version FROM Product_component_versionWhere SUBSTR(PRODUCT,1,6)='Oracle';

9、查看数据库的创建日期和归档方式Select Created, Log_Mode, Log_Mode From V$Database;

ORACLE用户连接的管理用系统管理员,查看当前数据库有几个用户连接:select username,sid,serial# from v$session;如果要停某个连接用alter system kill session 'sid,serial#';如果这命令不行,找它UNIX的进程数select pro.spid from v$session ses,v$process pro where ses.sid=21 and ses.paddr=pro.addr;说明:21是某个连接的sid数然后用 kill 命令杀此进程号

转载于:https://www.cnblogs.com/SZ2015/p/4710447.html

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