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Learn PostgreSQL - Second Edition

You're reading from  Learn PostgreSQL - Second Edition

Product type Book
Published in Oct 2023
Publisher Packt
ISBN-13 9781837635641
Pages 744 pages
Edition 2nd Edition
Languages
Authors (2):
Luca Ferrari Luca Ferrari
Profile icon Luca Ferrari
Enrico Pirozzi Enrico Pirozzi
Profile icon Enrico Pirozzi
View More author details

Table of Contents (22) Chapters

Preface Introduction to PostgreSQL Getting to Know Your Cluster Managing Users and Connections Basic Statements Advanced Statements Window Functions Server-Side Programming Triggers and Rules Partitioning Users, Roles, and Database Security Transactions, MVCC, WALs, and Checkpoints Extending the Database – the Extension Ecosystem Query Tuning, Indexes, and Performance Optimization Logging and Auditing Backup and Restore Configuration and Monitoring Physical Replication Logical Replication Useful Tools and Extensions Other Books You May Enjoy
Index

Exploring the SELECT statement

As we saw in the previous chapter, we can use the SELECT statement to filter our datasets using the equality condition. In the same way, we can filter records using > or < conditions, such as in the following example:

forumdb=> select * from categories where pk > 2;
 pk |         title         |           description      
----+-----------------------+---------------------------------
  3 | Programming Languages | All about programming languages
(1 row)

The preceding query returns all records that have pk > 2.

Another condition that we can use with the SELECT statement is the like condition. Let’s take a look at this next.

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