What Is an Operator in SQL?
by Ryan K. Stephens, Ronald R. Plew
Sams Teach Yourself SQL in 24 Hours, Second Edition
- Copyright
- Acknowledgments
- About the Authors
- Tell Us What You Think!
- Introduction
- A SQL Concepts Overview
- Building Your Database
- Getting Effective Results from Queries
- Building Sophisticated Database Queries
- SQL Performance Tuning
- Using SQL to Manage Users and Security
- Summarized Data Structures
- Applying SQL Fundamentals in Today's World
- Appendixes
- Common SQL Commands
- ASCII Table
- Answers to Quizzes and Exercises
- Hour 1, "Welcome to the World of SQL"
- Hour 2, "Defining Data Structures"
- Hour 3, "Managing Database Objects"
- Hour 4, "The Normalization Process"
- Hour 5, "Manipulating Data"
- Hour 6, "Managing Database Transactions"
- Hour 7, "Introduction to the Database Query"
- Hour 8, "Using Operators to Categorize Data"
- Hour 9, "Summarizing Data Results from a Query"
- Hour 10, "Sorting and Grouping Data"
- Hour 11, "Restructuring the Appearance of Data"
- Hour 12, "Understanding Dates and Time"
- Hour 13, "Joining Tables in Queries"
- Hour 14, "Using Subqueries to Define Unknown Data"
- Hour 15, "Combining Multiple Queries into One"
- Hour 16, "Using Indexes to Improve Performance"
- Hour 17, "Improving Database Performance"
- Hour 18, "Managing Database Users"
- Hour 19, "Managing Database Security"
- Hour 20, "Creating and Using Views and Synonyms"
- Hour 21, "Working with the System Catalog"
- Hour 22, "Advanced SQL Topics"
- Hour 23, "Extending SQL to the Enterprise, the Internet, and the Intranet"
- Hour 24, "Extensions to Standard SQL"
- CREATE TABLE Statements for Book Examples
- INSERT Statements for Data in Book Examples
- Glossary
- Index
What Is an Operator in SQL?
An operator is a reserved word or a character used primarily in an SQL statement's WHERE clause to perform operation(s), such as comparisons and arithmetic operations. Operators are used to specify conditions in an SQL statement and to serve as conjunctions for multiple conditions in a statement.
The operators discussed during this hour are
Comparison operators
Logical operators
Operators used to negate conditions
Arithmetic operators
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