Sams Teach Yourself SQL in 24 Hours, Third Edition By Ronald R. Plew, Ryan K. Stephens
Table of Contents
Hour 7. Introduction to the Database Query
You have been introduced to the database query, a means for obtaining useful information from a relational database. The SELECT statement, which is known as the Data Query Language (DQL) command, is used to create queries in SQL. The FROM clause must be included with every SELECT statement. You have learned how to place a condition on a query using the WHERE clause and how to sort data using the ORDER BY clause. You have learned the fundamentals of writing queries, and, after a few exercises, you should be prepared to learn more about queries during the next hour.
