Sams Teach Yourself SQL in 24 Hours, Third Edition By Ronald R. Plew, Ryan K. Stephens
Table of Contents
Part III. Getting Effective Results from Queries
Hour 8. Using Operators to Categorize Data
Operators are used in conjunction with the SELECT command to place extended criteria on data that is returned by a query. There are various operators that are available to the SQL user that support all data querying needs.