October 2023
Intermediate to advanced
744 pages
15h 51m
English
Content preview from Learn PostgreSQL - Second Edition
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5
Advanced Statements
In the previous chapter, we started taking our first steps with PostgreSQL. In this chapter, we will analyze the SQL language more deeply and write more complex queries. We will talk about SELECT/INSERT/UPDATE again, but this time, we will use the more advanced options surrounding them. We will then cover joins, common table expressions (CTEs), and merge in depth.
The topics we will talk about will be the following:
- Exploring the
SELECTstatement - Using
UPSERTandMERGE - Exploring CTEs
Technical requirements
Before starting, remember to start the Docker container named chapter_05, as shown below:
$ bash run-pg-docker.sh chapter_05
postgres@learn_postgresql:~$ psql -U forum forumdb
Exploring the SELECT statement
As we saw ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.