Oracle 数据字典 说明

一.官网上有关数据字典的信息

 

关于Oracle 的数据字典,官网的文档上有详细的说明,地址:

       Data Dictionary and Dynamic Performance Views

      http://download.oracle.com/docs/cd/E11882_01/server.112/e10713/datadict.htm#CNCPT2140

 

Overview of the Data Dictionary

An important part of an Oracle database is its data dictionary, which is a read-only set of tables that provides administrative metadata about the database. A data dictionary contains information such as the following:

·         The definitions of every schema object in the database, including default values for columns and integrity constraint information

·         The amount of space allocated for and currently used by the schema objects

·         The names of Oracle Database users, privileges and roles granted to users, and auditing information related to users (see "User Accounts")

The data dictionary is a central part of data management for every Oracle database. For example, the database performs the following actions:

·         Accesses the data dictionary to find information about users, schema objects, and storage structures

·         Modifies the data dictionary every time that a DDL statement is issued (see "Data Definition Language (DDL) Statements")

Because Oracle Database stores data dictionary data in tables, just like other data, users can query the data with SQL. For example, users can run SELECTstatements to determine their privileges, which tables exist in their schema, which columns are in these tables, whether indexes are built on these columns, and so on.

Contents of the Data Dictionary

The data dictionary consists of the following types of objects:

·         Base tables

These underlying tables store information about the database. Only Oracle Database should write to and read these tables. Users rarely access the base tables directly because they are normalized and most data is stored in a cryptic format.

·         Views

These views decode the base table data into useful information, such as user or table names, using joins and WHERE clauses to simplify the information. These views contain the names and description of all objects in the data dictionary. Some views are accessible to all database users, whereas others are intended for administrators only.

Typically, data dictionary views are grouped in sets. In many cases, a set consists of three views containing similar information and distinguished from each other by their prefixes, as shown in Table 6-1. By querying the appropriate views, you can access only the information relevant for you.

Data Dictionary View Sets

Prefix

User Access

Contents

Notes

DBA_

Database administrators

All objects

Some DBA_ views have additional columns containing information useful to the administrator.

ALL_

All users

Objects to which user has privileges

Includes objects owned by user. These views obey the current set of enabled roles.

USER_

All users

Objects owned by user

Views with the prefix USER_ usually exclude the column OWNER. This column is implied in the USER_ views to be the user issuing the query.

 

Not all views sets have three members. For example, the data dictionary contains a DBA_LOCK view but no ALL_LOCK view.

The system-supplied DICTIONARY view contains the names and abbreviated descriptions of all data dictionary views. The following query of this view includes partial sample output:

SQL> SELECT * FROM DICTIONARY ORDER BY TABLE_NAME;

TABLE_NAME                     COMMENTS

------------------------------ ----------------------------------------

ALL_ALL_TABLES                 Description of all object and relational

                               tables accessible to the user

 ALL_APPLY                      Details about each apply process that

                               dequeues from the queue visible to the

                               current user

 

Views with the Prefix DBA_

Views with the prefix DBA_ show all relevant information in the entire database. DBA_ views are intended only for administrators.

For example, the following query shows information about all objects in the database:

SELECT OWNER, OBJECT_NAME, OBJECT_TYPE FROM   DBA_OBJECTS ORDER BY OWNER, OBJECT_NAME;

Views with the Prefix ALL_

Views with the prefix ALL_ refer to the user's overall perspective of the database. These views return information about schema objects to which the user has access through public or explicit grants of privileges and roles, in addition to schema objects that the user owns.

For example, the following query returns information about all the objects to which you have access:

SELECT OWNER, OBJECT_NAME, OBJECT_TYPE FROM   ALL_OBJECTS ORDER BY OWNER, OBJECT_NAME;

Because the ALL_ views obey the current set of enabled roles, query results depend on which roles are enabled, as shown in the following example:

SQL> SET ROLE ALL;
Role set.
SQL> SELECT COUNT(*) FROM ALL_OBJECTS;
COUNT(*)
----------
68295
SQL> SET ROLE NONE;
Role set.
SQL> SELECT COUNT(*) FROM ALL_OBJECTS;
COUNT(*)
----------
53771

Application developers should be cognizant of the effect of roles when using ALL_ views in a stored procedure, where roles are not enabled by default.

 

Views with the Prefix USER_

The views most likely to be of interest to typical database users are those with the prefix USER_. These views:

·         Refer to the user's private environment in the database, including metadata about schema objects created by the user, grants made by the user, and so on

·         Display only rows pertinent to the user, returning a subset of the information in the ALL_ views

·         Has columns identical to the other views, except that the column OWNER is implied

·         Can have abbreviated PUBLIC synonyms for convenience

For example, the following query returns all the objects contained in your schema:

SELECT OBJECT_NAME, OBJECT_TYPE FROM   USER_OBJECTS ORDER BY OBJECT_NAME;

The DUAL Table

DUAL is a small table in the data dictionary that Oracle Database and user-written programs can reference to guarantee a known result. The dual table is useful when a value must be returned only once, for example, the current date and time. All database users have access to DUAL.

The DUAL table has one column called DUMMY and one row containing the value X. The following example queries DUAL to perform an arithmetical operation:

SQL> SELECT ((3*4)+5)/3 FROM DUAL;

((3*4)+5)/3

-----------

 5.66666667

 

Oracle Dual 表详解

http://blog.csdn.net/xujinyang/article/details/6830122

 

 

二.数据字典

 

Oracle数据字典是有表和视图组成,存储有关数据库结构信息的一些数据库对象。数据库字典描述了实际数据是如何组织的。比如一个表的创建者信息,创建时间信息,所属表空间信息,用户访问权限信息等。对它们可以象处理其他数据库表或视图一样进行查询,但不能进行任何修改。它们存放在SYSTEM表空间中,当用户在对数据库中的数据进行操作时遇到困难就可以访问数据字典来查看详细的信息。用户可以用SQL语句访问数据库数据字典。

 

Oracle数据库字典通常是在创建和安装数据库时被创建的,Oracle数据字典是Oracle数据库系统工作的基础,没有数据字典的支持,Oracle数据库系统就不能进行任何工作。数据字典中的表是不能直接被访问的,但是可以访问数据字典中的视图。

 

 

2.1 数据字典内容包括:

1,数据库中所有模式对象的信息,如表、视图、簇、及索引等。

2,分配多少空间,当前使用了多少空间等。

3,列的缺省值。

4,约束信息的完整性。

5,Oracle用户的名字。

6,用户及角色被授予的权限。

7,用户访问或使用的审计信息。

8,其它产生的数据库信息。

 

2.2  数据字典分为 数据字典表 和 数据字典视图

2.2. 1 数据字典表

       数据字典表里的数据是Oracle系统存放的系统数据,而普通表存放的是用户的数据。为了方便的区别这些表,这些表的名字都是用"$"结尾,这些表属于SYS用户。

       数据字典表由$ORACLE_HOME/rdbms/admin/sql.bsq 脚本创建, 这个脚本里又调用了其他的脚本来创建这些数据字典表。 在那些创建脚本里有基表的创建SQL。 感兴趣的自己打开看看。

 

       Oracle 对数据字典表的说明:

       These underlying tables store information about the database. Only Oracle Database should write to and read these tables. Users rarely access the base tables directly because they are normalized and most data is stored in a cryptic format.

 

       这些数据字典表,只有Oracle 能够进行读写。

 

       SYS用户下的这些数据字典表,存放在system 表空间下面,表名都用"$"结尾,为了便于用户对数据字典表的查询, Oracle对这些数据字典都分别建立了用户视图,这样即容易记住,还隐藏了数据字典表表之间的关系,Oracle针对这些对象的范围,分别把视图命名为DBA_XXXX, ALL_XXXX和USER_XXXX。

      

       关于这3类视图,下面有介绍。

 

       Oracle为了便于汇总数据字典表的信息,把所有的数据字典都汇集到dictionary表里了,通过对这个表的查询,我们可以很方便的找到数据库提供的数据字典。

 

2.2.2  数据字典视图

       动态性能视图由脚本:$ORACLE_HOME/rdbms/admin/catalog.sql 创建, 该脚本也只是一个总的调用,在该脚本里由调用了其他的脚本。 感兴趣的可以自己打开看一下,在那些脚本里,可以看到视图的创建SQL.

       这是因为这个脚本会创建动态视图,所以在做DB 升级的时候,也需要执行这个脚本,重新创建视图。

 

       数据字典视图分2类:静态数据字典(静态性能视图) 和 动态数据字典(动态性能视图)

 

2.2.2.1 静态数据字典(静态性能视图)

       静态数据字典中的视图分为三类,它们分别由三个前缀够成:user_*、 all_*、 dba_*。

user_*:该视图存储了关于当前用户所拥有的对象的信息。(即所有在该用户模式下的对象)

all_*:该试图存储了当前用户能够访问的对象的信息, 而不是当前用户拥有的对象。(与user_*相比,all_* 并不需要拥有该对象,只需要具有访问该对象的权限即可)

dba_*:该视图存储了数据库中所有对象的信息。(前提是当前用户具有访问这些数据库的权限,一般来说必须具有管理员权限)

 

       这些视图由SYS用户创建的,所以使用需要加上SYS,为了方便, Oracle为每个数据字典表的视图头建立了同名字的公共同义词(public synonyms). 这样简单的处理就省去了写sys.的麻烦。

 

 

示例:

(1)user_tables:主要描述当前用户拥有的所有表的信息,主要包括表名、表空间名、簇名等。通过此视图可以清楚了解当前用户可以操作的表有哪些。

SQL>select * from user_tables;

       (2)user_indexes: 查询该用户拥有哪些索引。

SQL>select index_name from user_indexes;

       (3)user_views: 查询该用户拥有哪些视图

SQL>select view_name from user_views;

       (4)user_objects:查询该用户拥有哪些数据库对象,对象包括表、视图、存储过程、触发器、包、索引、序列、JAVA文件等。

SQL>select object_name from user_objects;

       (5)user_users:主要描述当前用户的信息,主要包括当前用户名、帐户id、帐户状态、表空间名、创建时间等。

SQL>select * from user_users;

       (6)all_objects:查询某一用户下的所有表、过程、函数等信息。

SQL>select owner , object_name ,object_type from all_objects

 

 

2.2.2.2  动态数据字典(动态性能视图)

       除了静态数据字典中三类视图,其他的字典视图中主要的是V$视图,之所以这样叫是因为他们都是以V$或GV$开头的。这些视图会不断的进行更新,从而提供了关于内存和磁盘的运行情况,所以我们只能对其进行只读访问而不能修改它们。

 

Throughout its operation, Oracle Database maintains a set of virtual tables that record current database activity. These views are called dynamic performance views because they are continuously updated while a database is open and in use. The views, also sometimes called V$ views

 

V$视图是基于X$虚拟视图的。V$视图是SYS用户所拥有的,在缺省状况下,只有SYS用户和拥有DBA系统权限的用户可以看到所有的视图,没有DBA权限的用户可以看到USER_和ALL_视图,但不能看到DBA_视图。与DBA_,ALL,和USER_视图中面向数据库信息相反,这些视图可视的给出了面向实例的信息。      

       动态性能表用于记录当前数据库的活动,只存于数据库运行期间,实际的信息都取自内存和控制文件。 DBA可以使用动态视图来监视和调节数据。

 

关于动态性能视图,参考:

       Oracle 动态性能视图

       http://blog.csdn.net/xujinyang/article/details/6882148

 

 

2.3 视图家族

 

在Oracle的绝大多数数据字典视图中都有象DBA_TABLES,ALL_TABLES和USER_TABLES这样的视图家族。Oracle中有超过100个视图家族,下表列出了最重要和最常用的视图家族,需要注意的是每个视图家族都有一个DBA_,一个ALL_ 和一个USER_视图。

 

视图家族

描述

COL_PRIVS

包含了表的列权限,包括授予者、被授予者和权限

EXTENTS

数据范围信息,比如数据文件,数据段名(segment_name)和大小

INDEXES

索引信息,比如类型、唯一性和被涉及的表

IND_COLUMNS

索引列信息,比如索引上的列的排序方式

OBJECTS

对象信息,比如状态和DDL time

ROLE_PRIVS

角色权限,比如GRANT和ADMIN选项

SEGMENTS

表和索引的数据段信息,比如tablespace和storage

SEQUECNCES

序列信息,比如序列的cache、cycle和ast_number

SOURCE

除触发器之外的所有内置过程、函数、包的源代码

SYNONYMS

别名信息,比如引用的对象和数据库链接db_link

SYS_PRIVS

系统权限,比如grantee、privilege、admin选项

TAB_COLUMNS

表和视图的列信息,包括列的数据类型

TAB_PRIVS

表权限,比如授予者、被授予者和权限

TABLES

表信息,比如表空间(tablespace),存储参数(storage parms)和数据行的数量

TRIGGERS

触发器信息,比如类型、事件、触发体(trigger body)

USERS

用户信息,比如临时的和缺省的表空间

VIEWS

视图信息,包括视图定义

 

在Oracle中还有一些不常用的数据字典表,但这些表不是真正的字典家族,他们都是一些重要的单一的视图。这些视图见下表:

 

视图名称

描述

USER_COL_PRIVS_MADE

用户授予他人的列权限

USER_COL_PRIVS_RECD

用户获得的列权限

USER_TAB_PRIVS_MADE

用户授予他人的表权限

USER_TAB_PRIVS_RECD

用户获得的表权限

 

 

2.4 查看数据字典

       我们通过dictionary 字典来查看所有的视图和其描述。 该表只有2个字段:表名和描述

      

SQL> desc dictionary

 名称                                      是否为空? 类型

 ----------------------------------------- -------- -------------------------

 TABLE_NAME                                         VARCHAR2(30)

 COMMENTS                                           VARCHAR2(4000)

 

我们可以用以下SQL来查看所有数据字典对象:

SQL>select * from dictionary;

 

Oracle 11g中有2592个对象。

SQL> select count(*) from dictionary;

COUNT(*)

----------

2592

 

部分数据如下表:

视图名

描述

ALL_CATALOG

All tables, views, synonyms, sequences accessible to the user

ALL_COL_COMMENTS

Comments on columns of accessible tables and views

ALL_COL_GRANTS_MADE

Grants on columns for which the user is owner or grantor

ALL_COL_GRANTS_RECD

Grants on columns for which the user or PUBLIC is the grantee

ALL_COL_PRIVS

Grants on columns for which the user is the grantor, grantee, owner, or an enabled role or PUBLIC is the grantee

ALL_COL_PRIVS_MADE

Grants on columns for which the user is owner or grantor

ALL_COL_PRIVS_RECD

Grants on columns for which the user, PUBLIC or enabled role is the grantee

ALL_CONSTRAINTS

Constraint definitions on accessible tables

ALL_CONS_COLUMNS

Information about accessible columns in constraint definitions

ALL_DB_LINKS

Database links accessible to the user

ALL_DEF_AUDIT_OPTS

Auditing options for newly created objects

ALL_DEPENDENCIES

Dependencies to and from objects accessible to the user

ALL_ERRORS

Current errors on stored objects that user is allowed to create

ALL_INDEXES

Descriptions of indexes on tables accessible to the user

ALL_IND_COLUMNS

COLUMNs comprising INDEXes on accessible TABLES

ALL_OBJECTS

Objects accessible to the user

ALL_REFRESH

All the refresh groups that the user can touch

ALL_REFRESH_CHILDREN

All the objects in refresh groups, where the user can touch the group

ALL_SEQUENCES

Description of SEQUENCEs accessible to the user

ALL_SNAPSHOTS

Snapshots the user can look at

ALL_SOURCE

Current source on stored objects that user is allowed to create

ALL_SYNONYMS

All synonyms accessible to the user

ALL_TABLES

Description of tables accessible to the user

ALL_TAB_COLUMNS

Columns of all tables, views and clusters

ALL_TAB_COMMENTS

Comments on tables and views accessible to the user

ALL_TAB_GRANTS_MADE

User's grants and grants on user's objects

ALL_TAB_GRANTS_RECD

Grants on objects for which the user or PUBLIC is the grantee

ALL_TAB_PRIVS

Grants on objects for which the user is the grantor, grantee, owner, or an enabled role or PUBLIC is the grantee

ALL_TAB_PRIVS_MADE

User's grants and grants on user's objects

ALL_TAB_PRIVS_RECD

Grants on objects for which the user, PUBLIC or enabled role is the grantee

ALL_TRIGGERS

Triggers accessible to the current user

ALL_TRIGGER_COLS

Column usage in user's triggers or in triggers on user's tables

ALL_USERS

Information about all users of the database

ALL_VIEWS

Text of views accessible to the user

USER_AUDIT_CONNECT

Audit trail entries for user logons/logoffs

USER_AUDIT_OBJECT

Audit trail records for statements concerning objects, specifically: table, cluster, view, index, sequence, [public] database link, [public] synonym, procedure, trigger, rollback segment, tablespace, role, user

USER_AUDIT_SESSION

USER_AUDIT_STATEMENT

Audit trail records concerning grant, revoke, audit, noaudit and alter system

USER_AUDIT_TRAIL

Audit trail entries relevant to the user

USER_CATALOG

Tables, Views, Synonyms and Sequences owned by the user

USER_CLUSTERS

Descriptions of user's own clusters

USER_CLU_COLUMNS

Mapping of table columns to cluster columns

USER_COL_COMMENTS

Comments on columns of user's tables and views

USER_COL_GRANTS

Grants on columns for which the user is the owner, grantor or grantee

USER_COL_GRANTS_MADE

All grants on columns of objects owned by the user

USER_COL_GRANTS_RECD

Grants on columns for which the user is the grantee

USER_COL_PRIVS

Grants on columns for which the user is the owner, grantor or grantee

USER_COL_PRIVS_MADE

All grants on columns of objects owned by the user

USER_COL_PRIVS_RECD

Grants on columns for which the user is the grantee

USER_CONSTRAINTS

Constraint definitions on user's own tables

USER_CONS_COLUMNS

Information about accessible columns in constraint definitions

USER_CROSS_REFS

Cross references for user's views and synonyms

USER_DB_LINKS

Database links owned by the user

USER_DEPENDENCIES

Dependencies to and from a users objects

USER_ERRORS

Current errors on stored objects owned by the user

USER_EXTENTS

Extents comprising segments owned by the user

USER_FREE_SPACE

Free extents in tablespaces accessible to the user

USER_INDEXES

Description of the user's own indexes

USER_IND_COLUMNS

COLUMNs comprising user's INDEXes or on user's TABLES

USER_JOBS

All jobs owned by this user

USER_OBJECTS

Objects owned by the user

USER_OBJECT_SIZE

Sizes, in bytes, of various pl/sql objects

USER_OBJ_AUDIT_OPTS

Auditing options for user's own tables and views

USER_REFRESH

All the refresh groups

USER_REFRESH_CHILDREN

All the objects in refresh groups, where the user owns the refresh group

USER_RESOURCE_LIMITS

Display resource limit of the user

USER_ROLE_PRIVS

Roles granted to current user

USER_SEGMENTS

Storage allocated for all database segments

USER_SEQUENCES

Description of the user's own SEQUENCEs

USER_SNAPSHOTS

Snapshots the user can look at

USER_SNAPSHOT_LOGS

All snapshot logs owned by the user

USER_SOURCE

Source of stored objects accessible to the user

USER_SYNONYMS

The user's private synonyms

USER_SYS_PRIVS

System privileges granted to current user

USER_TABLES

Description of the user's own tables

USER_TABLESPACES

Description of accessible tablespaces

USER_TAB_AUDIT_OPTS

Auditing options for user's own tables and views

USER_TAB_COLUMNS

Columns of user's tables, views and clusters

USER_TAB_COMMENTS

Comments on the tables and views owned by the user

USER_TAB_GRANTS

Grants on objects for which the user is the owner, grantor or grantee

USER_TAB_GRANTS_MADE

All grants on objects owned by the user

USER_TAB_GRANTS_RECD

Grants on objects for which the user is the grantee

USER_TAB_PRIVS

Grants on objects for which the user is the owner, grantor or grantee

USER_TAB_PRIVS_MADE

All grants on objects owned by the user

USER_TAB_PRIVS_RECD

Grants on objects for which the user is the grantee

USER_TRIGGERS

Triggers owned by the user

USER_TRIGGER_COLS

Column usage in user's triggers

USER_TS_QUOTAS

Tablespace quotas for the user

USER_USERS

Information about the current user

USER_VIEWS

Text of views owned by the user

AUDIT_ACTIONS

Description table for audit trail action type codes. Maps action type numbers to action type names

COLUMN_PRIVILEGES

Grants on columns for which the user is the grantor, grantee, owner, or an enabled role or PUBLIC is the grantee

DICTIONARY

Description of data dictionary tables and views

DICT_COLUMNS

Description of columns in data dictionary tables and views

DUAL

GLOBAL_NAME

global database name

INDEX_HISTOGRAM

statistics on keys with repeat count

INDEX_STATS

statistics on the b-tree

RESOURCE_COST

Cost for each resource

ROLE_ROLE_PRIVS

Roles which are granted to roles

ROLE_SYS_PRIVS

System privileges granted to roles

ROLE_TAB_PRIVS

Table privileges granted to roles

SESSION_PRIVS

Privileges which the user currently has set

SESSION_ROLES

Roles which the user currently has enabled.

TABLE_PRIVILEGES

Grants on objects for which the user is the grantor, grantee, owner, or an enabled role or PUBLIC is the grantee

ACCESSIBLE_COLUMNS

Synonym for ALL_TAB_COLUMNS

ALL_COL_GRANTS

Synonym for COLUMN_PRIVILEGES

ALL_JOBS

Synonym for USER_JOBS

ALL_TAB_GRANTS

Synonym for TABLE_PRIVILEGES

CAT

Synonym for USER_CATALOG

CLU

Synonym for USER_CLUSTERS

COLS

Synonym for USER_TAB_COLUMNS

DBA_AUDIT_CONNECT

Synonym for USER_AUDIT_CONNECT

DBA_AUDIT_RESOURCE

Synonym for USER_AUDIT_RESOURCE

DBA_REFRESH_CHILDREN

Synonym for USER_REFRESH_CHILDREN

DICT

Synonym for DICTIONARY

IND

Synonym for USER_INDEXES

OBJ

Synonym for USER_OBJECTS

SEQ

Synonym for USER_SEQUENCES

SM$VERSION

Synonym for SM_$VERSION

SYN

Synonym for USER_SYNONYMS

TABS

Synonym for USER_TABLES

V$ACCESS

Synonym for V_$ACCESS

V$ARCHIVE

Synonym for V_$ARCHIVE

V$BACKUP

Synonym for V_$BACKUP

V$BGPROCESS

Synonym for V_$BGPROCESS

V$CIRCUIT

Synonym for V_$CIRCUIT

V$COMPATIBILITY

Synonym for V_$COMPATIBILITY

V$COMPATSEG

Synonym for V_$COMPATSEG

V$CONTROLFILE

Synonym for V_$CONTROLFILE

V$DATABASE

Synonym for V_$DATABASE

V$DATAFILE

Synonym for V_$DATAFILE

V$DBFILE

Synonym for V_$DBFILE

V$DBLINK

Synonym for V_$DBLINK

V$DB_OBJECT_CACHE

Synonym for V_$DB_OBJECT_CACHE

V$DISPATCHER

Synonym for V_$DISPATCHER

V$ENABLEDPRIVS

Synonym for V_$ENABLEDPRIVS

V$FILESTAT

Synonym for V_$FILESTAT

V$FIXED_TABLE

Synonym for V_$FIXED_TABLE

V$LATCH

Synonym for V_$LATCH

V$LATCHHOLDER

Synonym for V_$LATCHHOLDER

V$LATCHNAME

Synonym for V_$LATCHNAME

V$LIBRARYCACHE

Synonym for V_$LIBRARYCACHE

V$LICENSE

Synonym for V_$LICENSE

V$LOADCSTAT

Synonym for V_$LOADCSTAT

V$LOADTSTAT

Synonym for V_$LOADTSTAT

V$LOCK

Synonym for V_$LOCK

V$LOG

Synonym for V_$LOG

V$LOGFILE

Synonym for V_$LOGFILE

V$LOGHIST

Synonym for V_$LOGHIST

V$LOG_HISTORY

Synonym for V_$LOG_HISTORY

V$MLS_PARAMETERS

Synonym for V_$MLS_PARAMETERS

V$MTS

Synonym for V_$MTS

V$NLS_PARAMETERS

Synonym for V_$NLS_PARAMETERS

V$NLS_VALID_VALUES

Synonym for V_$NLS_VALID_VALUES

V$OPEN_CURSOR

Synonym for V_$OPEN_CURSOR

V$OPTION

Synonym for V_$OPTION

V$PARAMETER

Synonym for V_$PARAMETER

V$PQ_SESSTAT

Synonym for V_$PQ_SESSTAT

V$PQ_SLAVE

Synonym for V_$PQ_SLAVE

V$PQ_SYSSTAT

Synonym for V_$PQ_SYSSTAT

V$PROCESS

Synonym for V_$PROCESS

V$QUEUE

Synonym for V_$QUEUE

V$RECOVERY_LOG

Synonym for V_$RECOVERY_LOG

V$RECOVER_FILE

Synonym for V_$RECOVER_FILE

V$REQDIST

Synonym for V_$REQDIST

V$RESOURCE

Synonym for V_$RESOURCE

V$ROLLNAME

Synonym for V_$ROLLNAME

V$ROLLSTAT

Synonym for V_$ROLLSTAT

V$ROWCACHE

Synonym for V_$ROWCACHE

V$SESSION

Synonym for V_$SESSION

V$SESSION_CURSOR_CACHE

Synonym for V_$SESSION_CURSOR_CACHE

V$SESSION_EVENT

Synonym for V_$SESSION_EVENT

V$SESSION_WAIT

Synonym for V_$SESSION_WAIT

V$SESSTAT

Synonym for V_$SESSTAT

V$SESS_IO

Synonym for V_$SESS_IO

V$SGA

Synonym for V_$SGA

V$SGASTAT

Synonym for V_$SGASTAT

V$SHARED_SERVER

Synonym for V_$SHARED_SERVER

V$SQLAREA

Synonym for V_$SQLAREA

V$STATNAME

Synonym for V_$STATNAME

V$SYSSTAT

Synonym for V_$SYSSTAT

V$SYSTEM_CURSOR_CACHE

Synonym for V_$SYSTEM_CURSOR_CACHE

V$SYSTEM_EVENT

Synonym for V_$SYSTEM_EVENT

V$THREAD

Synonym for V_$THREAD

V$TIMER

Synonym for V_$TIMER

V$TRANSACTION

Synonym for V_$TRANSACTION

V$TYPE_SIZE

Synonym for V_$TYPE_SIZE

V$VERSION

Synonym for V_$VERSION

V$WAITSTAT

Synonym for V_$WAITSTAT

V$_LOCK

Synonym for V_$_LOCK

 

 

 

 

 

 

整理自网络

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