October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Week 2. In Review
Week 1 spends a great deal of time introducing a very important topic: the SELECT statement. Week 2 branches out into various topics that collectively form a thorough introduction to the Structured Query Language (SQL).
Day 8 discusses database normalization. It covers the three most common normal forms, which are guidelines on how to break down and arrange tables in your database. You learned that normalization can help in overall organization and development, but can adversely affect performance.
Day 9 describes how to design and build a database and introduces the commands CREATE DATABASE and CREATE TABLE. A table can be created with any number of fields, each of which can be of a database vendor-defined data type. The ...
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