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Mastering PostgreSQL 15

Mastering PostgreSQL 15

By : Hans-Jürgen Schönig
4.9 (7)
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Mastering PostgreSQL 15

Mastering PostgreSQL 15

4.9 (7)
By: Hans-Jürgen Schönig

Overview of this book

Starting with an introduction to the newly released features of PostgreSQL 15, this updated fifth edition will help you get to grips with PostgreSQL administration and how to build dynamic database solutions for enterprise apps, including designing both physical and technical aspects of the system. You'll explore advanced PostgreSQL features, such as logical replication, database clusters, advanced indexing, and user management to manage and maintain your database. You'll then work with the PostgreSQL optimizer, configure PostgreSQL for high speed, and move from Oracle to PostgreSQL. Among the other skills that the book will help you build, you’ll cover transactions, handling recursions, working with JSON and JSONB data, and setting up a Patroni cluster. It will show you how to improve performance with query optimization. You'll also focus on managing network security and work with backups and replication while exploring useful PostgreSQL extensions that optimize the performance of large databases. By the end of this PostgreSQL book, you’ll be able to use your database to its utmost capacity by implementing advanced administrative tasks with ease.
Table of Contents (16 chapters)
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Introducing operator classes

So far, the goal has been to figure out what to index and whether to indiscriminately apply an index on a column or a group of columns. There is one assumption, however, that we have silently accepted to make this work. Up until now, we have worked under the assumption that the order in which the data has to be sorted is a somewhat fixed constant. In reality, this assumption might not hold. Sure, numbers will always be in the same order, but other kinds of data will most likely not have a predefined, fixed sort order.

To prove my point, I have compiled a real-world example. Take a look at the following two records:

1118 09 08 78
2345 01 05 77

My question now is whether these two rows are ordered properly. They might be because one comes before another. However, this is wrong because these two rows have some hidden semantics. What you are looking at here are two Austrian social security numbers. 09 08 78 actually refers to August 9 1978, and 01...

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