Difference between revisions of "Database Schema"

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[[PostgreSQL]]:
+
[[PostgreSQL]]: <code>[[pg_catalog]]</code> and <code>[[public]]</code>.
 
* Show/List [[schema]]s:
 
* Show/List [[schema]]s:
 
** <code>select [[nspname]] from [[pg_catalog]].pg_namespace;</code>  
 
** <code>select [[nspname]] from [[pg_catalog]].pg_namespace;</code>  

Revision as of 08:13, 12 May 2022

wikipedia:Database schema are analogous to directories at the operating system level, except that schemas cannot be nested. [1]


Typical schemas usage scenarios [2]:

  • To allow many users to use one database without interfering with each other.
  • To organize database objects into logical groups to make them more manageable.
  • Third-party applications can be put into separate schemas so they do not collide with the names of other objects.



Grant examples on schemas:


PostgreSQL: pg_catalog and public.


GRANT SELECT ON ALL TABLES IN SCHEMA public TO xxx;

Related

See also

  • https://www.postgresql.org/docs/current/ddl-schemas.html
  • https://www.postgresql.org/docs/current/ddl-schemas.html
  • https://stackoverflow.com/a/10353730
  • https://dba.stackexchange.com/questions/40045/how-do-i-list-all-schemas-in-postgresql
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