December 2000
Intermediate to advanced
224 pages
9h 52m
English
Content preview from SQL in a NutshellBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 1. SQL, Vendor Implementations, and Some History
In the 1970s, IBM developed a product called SEQUEL, or Structured English Query Language, which ultimately became SQL, the Structured Query Language.
IBM, along with other relational database vendors, wanted a standardized method for accessing and manipulating data in a relational database. Over the decades, many competing languages have allowed programmers and developers to access and manipulate data. However, few have been as easy to learn and as universally accepted as SQL. Programmers and developers now have the benefit of learning a language that, with minor adjustments, is applicable to a wide variety of database applications and products.
SQL in a Nutshell describes four implementations of the current SQL standard, SQL99 (also known as SQL3): Microsoft’s SQL Server, MySQL, Oracle, and PostgreSQL. For those migrating from implementations of the earlier SQL standard, this chapter describes the current SQL standard and the ways in which it differs from the earlier standard. This chapter also provides a bit of history of the standards evolution.
The Relational Database Model
Relational Database Management Systems (RDBMSs), such as SQL Server and Oracle, are the primary engines of information systems worldwide, particularly Internet/Intranet applications and distributed client/server computing systems.
An RDBMS is defined as a system whose users view data as a collection of tables related to each other through common ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
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.