Sams Teach Yourself SQL in 24 Hours, Third Edition By Ronald R. Plew, Ryan K. Stephens
Table of Contents
Hour 8. Using Operators to Categorize Data
An operator is a reserved word or a character used primarily in a SQL statement's WHERE clause to perform operation(s), such as comparisons and arithmetic operations. Operators are used to specify conditions in a SQL statement and to serve as conjunctions for multiple conditions in a statement.
