Book Image

Mastering PostgreSQL 9.6

By : Hans-Jürgen Schönig
Book Image

Mastering PostgreSQL 9.6

By: Hans-Jürgen Schönig

Overview of this book

PostgreSQL is an open source database used for handling large datasets (Big Data) and as a JSON document database. It also has applications in the software and web domains. This book will enable you to build better PostgreSQL applications and administer databases more efficiently. We begin by explaining the advanced database design concepts in PostgreSQL 9.6, along with indexing and query optimization. You will also see how to work with event triggers and perform concurrent transactions and table partitioning, along with exploring SQL and server tuning. We will walk you through implementing advanced administrative tasks such as server maintenance and monitoring, replication, recovery and high availability, and much more. You will understand the common and not-so-common troubleshooting problems and how you can overcome them. By the end of this book, you will have an expert-level command of the advanced database functionalities and will be able to implement advanced administrative tasks with PostgreSQL.
Table of Contents (14 chapters)
Free Chapter
1
PostgreSQL Overview

Achieving better answers with fuzzy searching

Performing precise searching is not the only thing expected by users these days. Modern websites have educated users in a way that they always expect a result regardless of the user input. If you search on Google, there will always be an answer even if the user input is wrong, full of typos, or simply pointless. People expect good results regardless of the input data.

Taking advantage of pg_trgm

To do fuzzy searching with PostgreSQL, you can add the pg_trgm extension. To activate the extension, just run the following instruction:

test=# CREATE EXTENSION pg_trgm;
CREATE EXTENSION

The pg_trgm extension is pretty powerful, and to show what it is capable of, I have compiled some sample data consisting of 2,354 names of villages...