VIEWS: DBA_, ALL_, USER_
IS 475
Metadata
Data about the data—how tables are constructed, what data types are used, what fields are primary or foreign keys, etc.
Standard user views include:
user_tables => Shows information about the tables owned by the user.
Example:
select table_name from user_tables;
all_tables => Shows information about all the tables the user has access to.
Example: select
table_name from all_tables where owner like 'IS475%';
user_catalog => Shows the tables and views owned by the user.
Example: Select
* from user_catalog order by table_type, table_name;
all_catalog => All users.
Example:
select * from all_catalog where owner like 'IS475%';
user_constraints => Shows the constraints for tables owned by the user.
Example:
Column constraint_name format a15;
Column table_name format a12;
Column r_constraint_name format a10;
Column search_conditiona format a20 truncate;
Set pagesize 50;
select constraint_name, constraint_type, table_name, r_constraint_name, search_condition from user_constraints;
all_constraints => All users.
Example:
select constraint_name, constraint_type from all_constraints where owner like 'IS475%';
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user_indexes => Shows the indexes created for the primary keys.
Example:
select index_name, table_owner, table_name from user_indexes;
all_indexes => All users.
user_tab_columns => Shows data about each column in each table.
Example:
select table_name, column_name, data_type from user_tab_columns where table_name = 'ZIPCODE'
all_tab_columns => All users.
user_views => Shows the SQL statement that defines each view.
Example:
select text from user_views where view_name = 'ENROLLMENT_VIEW';
all_views: All users.
System Data Dictionary Catalog tables/views:
(You may not be able to access these views due to limits on rights and roles.)
user$ => Table of users.
Example:
desc user$
Example:
select name, ctime from user$ where name like 'J%';
Here are only a few of the USER_, ALL_, and DBA views
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USER VIEWS
user_tables
Some Column Names
Description of View Content
user_constraints
Lists the tables owned by the current user.
Lists the constraints on tables owned by the current
user.
user_sequences
Lists the sequences owned by the current user.
user_tab_privs
List the table privileges granted to the current user.
Lists settings for current user’s password, such as “life
time”.
Lists resource settings for current user, such as
“connect time”.
user_password_limits
user_resource_limits
ALL (DATA DICTIONARY) VIEWS
all_tables
all_constraints
all_cons_columns
Lists the columns associated with each constraint.
all_tab_privs
all_sequences
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DBA VIEWS
dba_users
Lists all users’ information: ID, account status, profile,
etc.
dba_profiles
Lists all profile settings.
dba_tables
Lists the name and settings for tables.
dba_tab_columns
List all columns and their settings in each table.
dba_unused_col_tabs
dba_segments
Lists tables that contain unused columns.
List table privileges granted to the current user on any
table.
Lists information about segments—type, owner,
location.
dba_indexes
Lists indexes, their owner, type, etc.
dba_sys_privs
Lists system privileges granted.
dba_role_privs
Lists all roles and grantees.
dba_roles
Lists all roles.
dba_tab_privs
dba_catalog
dba_tablespaces
dba_data_files
database_properties
Shows the database version, SID (name), etc.
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