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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

Getting ready

Let's create two randomly populated tables, of which one is large:

CREATE TABLE dish( dish_id SERIAL PRIMARY KEY, dish_description text);CREATE TABLE eater( eater_id SERIAL, eating_date date, dish_id int REFERENCES dish (dish_id));INSERT INTO dish (dish_description)VALUES ('Lentils'), ('Mango'), ('Plantain'), ('Rice'), ('Tea');INSERT INTO eater(eating_date, dish_id)SELECT floor(abs(sin(n)) * 365) :: int + date '2014-01-01', ceil(abs(sin(n :: float * n))*5) :: intFROM generate_series(1,500000) AS rand(n);

Notice that the data is not truly random. It is generated by a deterministic procedure, so you get exactly the same result if you copy the preceding code.

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Publisher Resources

ISBN: 9781788474924Supplemental Content