数据字典视图的查询

数据字典视图的查询

SQL> desc dictionary 

 Name                                      Null?    Type

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

 TABLE_NAME                                         VARCHAR2(30)

 COMMENTS                                           VARCHAR2(4000)

SQL> desc v$fixed_table

 Name                                      Null?    Type

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

 NAME                                               VARCHAR2(30)

 OBJECT_ID                                          NUMBER

 TYPE                                               VARCHAR2(5)

 TABLE_NUM                                          NUMBER

select * from dictionary; 

或

select * from v$fixed_table; 可以查询所有的数据字典（视图）

dictionary 含有一列comments 注释，

通过where 条件过滤table_name 项，

如，select * from dictionary where table_name like '%INDEX%';

SQL> col table_name for a30

SQL> col comments for a50

SQL> set line 200

SQL> select * from dictionary where table_name like '%INDEX%';

TABLE_NAME                     COMMENTS

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

DBA_INDEXES                    Description for all indexes in the database

DBA_INDEXTYPES                 All indextypes

DBA_INDEXTYPE_ARRAYTYPES       All array types specified by the indextype

DBA_INDEXTYPE_COMMENTS         Comments for user-defined indextypes

DBA_INDEXTYPE_OPERATORS        All indextype operators

DBA_PART_INDEXES

DBA_XML_INDEXES                Description of all XML indexes in the database

USER_INDEXES                   Description of the user's own indexes

USER_INDEXTYPES                All user indextypes

USER_INDEXTYPE_ARRAYTYPES      All array types specified by the indextype

USER_INDEXTYPE_COMMENTS        Comments for user-defined indextypes

TABLE_NAME                     COMMENTS

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

USER_INDEXTYPE_OPERATORS       All user indextype operators

USER_PART_INDEXES

USER_XML_INDEXES               Description of the user's own XMLType indexes

ALL_INDEXES                    Descriptions of indexes on tables accessible to th

                               e user

ALL_INDEXTYPES                 All indextypes available to the user

ALL_INDEXTYPE_ARRAYTYPES       All array types specified by the indextype

ALL_INDEXTYPE_COMMENTS         Comments for user-defined indextypes

ALL_INDEXTYPE_OPERATORS        All operators available to the user

ALL_PART_INDEXES

TABLE_NAME                     COMMENTS

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

ALL_XML_INDEXES                Description of the all XMLType indexes that the us

                               er has privileges on

INDEX_HISTOGRAM                statistics on keys with repeat count

INDEX_STATS                    statistics on the b-tree

GV$INDEXED_FIXED_COLUMN        Synonym for GV_$INDEXED_FIXED_COLUMN

V$INDEXED_FIXED_COLUMN         Synonym for V_$INDEXED_FIXED_COLUMN

25 rows selected.