以下表格中收集了Oracle数据字典中几乎所有的视图或别名，至于每个视图或别名的字段请用‘Describe’语句来查询。
命名说明：
Oracle数据字典中，对象名称多数以"USER."，"ALL."，"DBA."为前缀"USER."视图中记录通常记录执行查询的帐户所拥有的对象的信息，"ALL."视图中记录包括"USER"记录和授权至PUBLIC或用户的对象的信息，"DBA."视图包含所有数据库对象，而不管其所有者。
使用举例：
select * from dba_data_files
查询表空间的信息(当前用户必须拥有DBA角色)。
select owner , object_name ,object_type from all_objects
查询某一用户下的所有表、过程、函数等信息。
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
