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Common SQL Commands
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Common SQL Commands
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
Welcome to the World of SQL
SQL Definition and History
SQL Sessions
DISCONNECT
Types of SQL Commands
An Introduction to the Database Used in This Book
Summary
Q&A
Workshop
Building Your Database
Defining Data Structures
What Is Data?
Basic Data Types
Summary
Q&A
Workshop
Managing Database Objects
What Are Database Objects?
What Is a Schema?
A Table: The Primary Storage for Data
Integrity Constraints
Summary
Q&A
Workshop
The Normalization Process
Normalizing a Database
Summary
Q&A
Workshop
Manipulating Data
Overview of Data Manipulation
Populating Tables with New Data
Updating Existing Data
Deleting Data from Tables
Summary
Q&A
Workshop
Managing Database Transactions
What Is a Transaction?
What Is Transactional Control?
Transactional Control and Database Performance
Summary
Q&A
Workshop
Getting Effective Results from Queries
Introduction to the Database Query
What Is a Query?
Introduction to the SELECT Statement
Examples of Simple Queries
Summary
Q&A
Workshop
Using Operators to Categorize Data
What Is an Operator in SQL?
Comparison Operators
Logical Operators
Conjunctive Operators
Negating Conditions with the NOT Operator
Arithmetic Operators
Summary
Q&A
Workshop
Summarizing Data Results from a Query
What Are Aggregate Functions?
Summary
Q&A
Workshop
Sorting and Grouping Data
Why Group Data?
The GROUP BY Clause
GROUP BY Versus ORDER BY
The HAVING Clause
Summary
Q&A
Workshop
Restructuring the Appearance of Data
The Concepts of ANSI Character Functions
Various Common Character Functions
Miscellaneous Character Functions
Mathematical Functions
Conversion Functions
The Concept of Combining Character Functions
Summary
Q&A
Workshop
Understanding Dates and Times
How Is a Date Stored?
Date Functions
Date Conversions
Summary
Q&A
Workshop
Building Sophisticated Database Queries
Joining Tables in Queries
Selecting Data from Multiple Tables
Types of Joins
Join Considerations
Summary
Q&A
Workshop
Using Subqueries to Define Unknown Data
What Is a Subquery?
Embedding a Subquery Within a Subquery
Summary
Q&A
Workshop
Combining Multiple Queries into One
Single Queries Versus Compound Queries
Why Would I Ever Want to Use a Compound Query?
Compound Query Operators
Using an ORDER BY with a Compound Query
Using a GROUP BY with a Compound Query
Retrieving Accurate Data
Summary
Q&A
Workshop
SQL Performance Tuning
Using Indexes to Improve Performance
What Is an Index?
How Do Indexes Work?
The CREATE INDEX Command
Types of Indexes
When Should Indexes Be Considered?
When Should Indexes Be Avoided?
Summary
Q&A
Workshop
Improving Database Performance
What Is SQL Statement Tuning?
Database Tuning Versus SQL Tuning
Formatting Your SQL Statement
Full Table Scans
Other Performance Considerations
Performance Tools
Summary
Q&A
Workshop
Using SQL to Manage Users and Security
Managing Database Users
Users Are the Reason
The Management Process
Tools Utilized by Database Users
Summary
Q&A
Workshop
Managing Database Security
What Is Database Security?
How Does Security Differ from User Management?
What Are Privileges?
Controlling User Access
Controlling Privileges Through Roles
Summary
Q&A
Workshop
Summarized Data Structures
Creating and Using Views and Synonyms
What Is a View?
Creating Views
Dropping a View
What Is a Synonym?
Summary
Q&A
Workshop
Working with the System Catalog
What Is the System Catalog?
How Is the System Catalog Created?
What Is Contained in the System Catalog?
Examples of System Catalog Tables by Implementation
Querying the System Catalog
Updating System Catalog Objects
Summary
Q&A
Workshop
Applying SQL Fundamentals in Today's World
Advanced SQL Topics
Advanced Topics
Cursors
Stored Procedures and Functions
Triggers
Dynamic SQL
Call-Level Interface
Using SQL to Generate SQL
Direct Versus Embedded SQL
Summary
Q&A
Workshop
Extending SQL to the Enterprise, the Internet, and the Intranet
SQL and the Enterprise
Accessing a Remote Database
Accessing a Remote Database Through a Web Interface
SQL and the Internet
SQL and the Intranet
Summary
Q&A
Workshop
Extensions to Standard SQL
Various Implementations
Examples of Extensions from Some Implementations
Interactive SQL Statements
Summary
Q&A
Workshop
Appendixes
Common SQL Commands
SQL Statements
SQL Clauses
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
EMPLOYEE_TBL
EMPLOYEE_PAY_TBL
CUSTOMER_TBL
ORDERS_TBL
PRODUCTS_TBL
INSERT Statements for Data in Book Examples
INSERT Statements
Glossary
Index
Search in book...
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Appendixes
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SQL Statements
Appendix A. Common SQL Commands
SQL Statements
SQL Clauses
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