You're reading from Learn SQL Database Programming

Product typeBook

Published inMay 2020

Reading LevelIntermediate

PublisherPackt

ISBN-139781838984762

Edition1st Edition

Languages

SQL

Concepts

Database Programming

Author (1)

Josephine Bush

Understanding databases

A database is a collection of data. You store databases in a relational database management system (RDMS). The RDMS is the basis for modern database systems like MySQL, SQL Server, Oracle, PostgreSQL, and others. These will be covered in more detail later in this chapter.

Tables

In an RDMS, objects called tables store data. Tables are a collection of related data stored in columns and rows. The following screenshot is a cross-section of a table that contains data about baseball players' appearances in all-star games:

A NULL value in a table is a value that appears to be blank. It doesn't represent a string of blank spaces, zero, or a zero-length character string: it's a missing or unknown...

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Learn SQL Database Programming

Published in: May 2020Publisher: PacktISBN-13: 9781838984762

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Author (1)

Josephine Bush

Josephine Bush has over 10 years experience as a Database Administrator. Her experience is extensive and broad-based, including in financial, business, and energy data systems using MySQL, SQL Server, Oracle, and PostgreSQL. She is a Microsoft Certified Solutions Expert: Data Management and Analytics. She holds a BS in Information Technology, an MBA in IT Management, and an MS in Data Analytics.
Read more about Josephine Bush

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