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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 to do it…

Let's create the following view:

CREATE VIEW v_dish ASSELECT dish_description, count(*)FROM dish JOIN eater USING (dish_id)GROUP BY dish_descriptionORDER BY 1;

Then, we'll query it:

SELECT * FROM v_dish;

We obtain the following output:

dish_description  | count  ------------------+-------- Lentils          |  64236 Mango            |  66512 Plantain         |  74058 Rice             |  90222 Tea              | 204972(5 rows)

With a very similar syntax, we create a materialized view with the same underlying query:

CREATE MATERIALIZED VIEW m_dish ASSELECT dish_description, count(*)FROM dish JOIN eater USING (dish_id)GROUP BY dish_descriptionORDER BY 1;

The corresponding query yields the same output as before:

SELECT * FROM m_dish;

The materialized version is much faster than the non-materialized ...

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Publisher Resources

ISBN: 9781788474924Supplemental Content