January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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Common mistakes in writing queries
There are some common mistakes and bad practices that developers may fall into. For example, a relational database is based on set theory; new developers tend to think in the scope of row-level manipulation instead of set manipulation. In addition, a lot of people create poor physical designs because they aren't familiar with relational-database modeling. In this section, we'll cover common mistakes in writing queries. For modelling issues, it's recommended to have a look at normalization because normalization also can boost performance by reducing data size and enhance statistics. In general, there are several issues that might lead to bad performance:
- Incorrect statistics: This might happen if there are ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.