December 2017
Beginner
412 pages
10h 8m
English
A relational database is a collection of tables, each of which has a fixed number of columns and a variable number of rows. Each column in a table has a name and contains values of the same data type, such as integer or string. Each row, or record, contains values that are related to each other, such as a particular patient’s name, date of birth, and blood type.

Superficially, each table looks like a spreadsheet or a file with one record per line (see The Readline Technique), but behind the scenes, the database does a lot of work to keep track of which values are where and how different tables relate to one another.
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