Oracle用户常用数据字典

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。

一、用户

查看当前用户的缺省表空间

SQL>SELECT username,default_tablespace FROM user_users;

查看当前用户的角色

SQL>SELECT * FROM user_role_privs;

查看当前用户的系统权限和表级权限

SQL>SELECT * FROM user_sys_privs;

SQL>SELECT * FROM user_tab_privs;

二、表

查看用户下所有的表

SQL>SELECT* FROM user_tables;

查看名称包含log字符的表

SQL>SELECT object_name,object_id FROM user_objects WHERE INSTR(object_name,'LOG')>0;

查看某表的创建时间

SQL>SELECT object_name,created FROM user_objects WHERE object_name=UPPER('&table_name');

查看某表的大小

SQL>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

SQL>SELECT table_name,cache FROM user_tables WHERE INSTR(cache,'Y')>0;

三、索引

查看索引个数和类别

SQL>SELECT index_name,index_type,table_name FROM user_indexes ORDER BY table_name;

查看索引被索引的字段

SQL>SELECT * FROM user_ind_columns WHERE index_name=UPPER('&index_name');

查看索引的大小

SQL>SELECT SUM(bytes)/(1024*1024)AS size(M)

FROM user_segments WHERE segment_name=UPPER('&index_name');

四、序列号

查看序列号,last_number是当前值

SQL>SELECT * FROM user_sequences;

五、视图

查看视图的名称

SQL>SELECT view_name FROM user_views;

查看创建视图的select语句

SQL>SELECT view_name,text_length FROM user_views;

SQL>SET long 2000;

//说明:可以根据视图的text_length值设定set long 的大小

SQL>SELECT text FROM user_views WHERE view_name=UPPER('&view_name');

六、同义词

查看同义词的名称

SQL>SELECT * FROM user_synonyms;

七、约束条件

查看某表的约束条件

SQL>SELECT constraint_name, constraint_type,search_condition, r_constraint_name
FROM user_constraints WHERE table_name = UPPER('&table_name');
//注意,表名一定是大写才行
SQL>SELECT c.constraint_name,c.constraint_type,cc.column_name
FROM user_constraints c,user_cons_columns cc
WHERE c.owner = upper('&table_owner')
AND c.table_name = UPPER('&table_name')
AND c.owner = cc.owner and c.constraint_name = cc.constraint_name 6 ORDER BY cc.position;

八、存储函数和过程

查看函数和过程的状态

SQL>SELECT object_name,status FROM user_objects WHERE object_type='FUNCTION';

SQL>SELECT object_name,status FROM user_objects WHERE object_type='PROCEDURE';

查看函数和过程的源代码

SQL>SELECT text from all_source WHERE owner=user AND name=UPPER('&plsql_name');

九、触发器

查看触发器

SET long 50000;
SET heading off;
SET pagesize 2000;
SELECT
'create or replace trigger ' ||
trigger_name || '' || chr(10)||
DECODE( SUBSTR( trigger_type, 1, 1 ),
'A', 'AFTER', 'B', 'BEFORE', 'I', 'INSTEAD OF' ) ||
chr(10) ||
triggering_event || chr(10) ||
'ON ' || table_owner || '.' ||
table_name || '' || chr(10) ||
DECODE( instr( trigger_type, 'EACH ROW' ), 0, null,
'FOR EACH ROW' ) || chr(10) ,
trigger_body
FROM user_triggers;
【原文:http://db.cnfan.net/Oracle/1682.html】

posted on 2009-01-22 14:40  CodingME!  阅读(477)  评论(0编辑  收藏  举报

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