April 2026
Beginner
493 pages
23h 2m
English
Content preview from SQL
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1.2 What Is SQL?
Since you’re holding this book in your hands (or viewing it on your screen), you already have an idea of what SQL is all about that made you pursue the goal of learning about it in detail. We’ve already gone over SQL “informally,” so it’s time for a formal introduction.
Structured Query Language (SQL) is a programming language that’s used to manage, manipulate, and query contents of relational database systems. SQL was one of the first languages to target E. F. Codd’s relational model, which we mentioned in Section 1.1. It was initially developed in the 1970s by IBM, and it evolved into an American National Standards Institute (ANSI) and International Organization for Standardization (ISO) standard in the 1980s. The language ...
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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.