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PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

How it works…

PostgreSQL stores information about the database in catalog tables. They describe every aspect of the way the database has been defined. There is a main set of catalog tables stored in a schema, called pg_catalog. There is a second set of catalog objects called the Information Schema, which is the SQL standard way of accessing information in a relational database.

We want to exclude both of these schemas from our query. Otherwise, we'll get too much information. We excluded them in the preceding query using the NOT IN phrase in the WHERE clause.

Note that this query shows only the number of tables in one of the databases on the PostgreSQL server. You can only see the tables in the database to which you are currently connected, ...
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Publisher Resources

ISBN: 9781788474924Supplemental Content