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Book Relational Database and Transact SQL

    Book Details:
  • Author : Lucy Scott
  • Publisher : Createspace Independent Publishing Platform
  • Release : 2017-08
  • ISBN : 9781974679980
  • Pages : 316 pages

Download or read book Relational Database and Transact SQL written by Lucy Scott and published by Createspace Independent Publishing Platform. This book was released on 2017-08 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces you to the field of relational database development and usage. There are many good books in this field. This book is different. It covers the basics so that beginners can read cover to cover. It is not a book for all levels of readers. For example, this book uses Microsoft SQL Server and Transact-SQL (or T-SQL). It will not mention the different dialect of Oracle or MySQL. If you are interested in Oracle or MySQL, you should use a different book. If you learned SQL Server from this book at your institution and you need to use other DBMS in your future job, the knowledge is only one Google away. This is not a reference book. For example, there are multiple ways to use aliases in T-SQL, but we only use one way. We believe that it is pretty easy to know different ways of using aliases once you finish this book. Why introduce all the different ways of using aliases for the first timer? This book is also unique with over 100 SQL examples and exercises. Most of these examples and exercises are paired. Readers learn one SQL example and can find a corresponding SQL exercise. We believe you have to write the codes in order to show you understood this book. You won't complete this book in 24 hours or 7 days. Even though the book is simple, by the end of the book, readers will be able to apply the knowledge learned to real world projects. We include one project with the detailed process of developing the database and the SQL examples of using the database. This book also includes three case studies readers can practice. This book uses a custom database which is simple with very limited data. The advantage of this approach is that you can manually find the solution before you write the SQL statement (Appendix 2 provides all data of the database). For example, if the question asks for the highest priced deliveries product, you can manually go to Appendix 2 of the book and find the product before you write the SQL statement. Please use Amazon's preview to take a look of the book before purchasing.

Book Relational Database and Transact SQL Second Edition

Download or read book Relational Database and Transact SQL Second Edition written by Lucy Scott and published by . This book was released on 2021-02-19 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces you to the field of relational database development and usage. There are many good books in this field. This book is different. It covers the basics so that beginners can read cover to cover. It is not a book for all levels of readers. For example, this book uses Microsoft SQL Server and Transact-SQL (or T-SQL). It will not mention the different dialect of Oracle or MySQL. If you are interested in Oracle or MySQL, you should use a different book. If you learned SQL Server from this book at your institution and you need to use other DBMS in your future job, the knowledge is only one Google away. This is not a reference book. For example, there are multiple ways to use aliases in T-SQL, but we only use one way. We believe that it is pretty easy to know different ways of using aliases once you finish this book. Why introduce all the different ways of using aliases for the first timer?This book is also unique with over 100 SQL examples and exercises. Most of these examples and exercises are paired. Readers learn one SQL example and can find a corresponding SQL exercise. We believe you have to write the codes in order to show you understood this book. You won't complete this book in 24 hours or 7 days.Even though the book is simple, by the end of the book, readers will be able to apply the knowledge learned to real world projects. We include one project with the detailed process of developing the database and the SQL examples of using the database. This book also includes three case studies readers can practice. This book uses a custom database which is simple with very limited data. The advantage of this approach is that you can manually find the solution before you write the SQL statement (Appendix 2 provides all data of the database). For example, if the question asks for the highest priced deliveries product, you can manually go to Appendix 2 of the book and find the product before you write the SQL statement.Please use Amazon's preview to take a look of the book before purchasing.

Book Pro SQL Server Relational Database Design and Implementation

Download or read book Pro SQL Server Relational Database Design and Implementation written by Louis Davidson and published by Apress. This book was released on 2016-12-29 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn effective and scalable database design techniques in a SQL Server 2016 and higher environment. This book is revised to cover in-memory online transaction processing, temporal data storage, row-level security, durability enhancements, and other design-related features that are new or changed in SQL Server 2016. Designing an effective and scalable database using SQL Server is a task requiring skills that have been around for forty years coupled with technology that is constantly changing. Pro SQL Server Relational Database Design and Implementation covers everything from design logic that business users will understand, all the way to the physical implementation of design in a SQL Server database. Grounded in best practices and a solid understanding of the underlying theory, Louis Davidson shows how to "get it right" in SQL Server database design and lay a solid groundwork for the future use of valuable business data. The pace of change in relational database management systems has been tremendous these past few years. Whereas in the past it was enough to think about optimizing data residing on spinning hard drives, today one also must consider solid-state storage as well as data that are constantly held in memory and never written to disk at all except as a backup. Furthermore, there is a trend toward hybrid cloud and on-premise database configurations as well a move toward preconfigured appliances. Pro SQL Server Relational Database Design and Implementation guides in the understanding of these massive changes and in their application toward sound database design. Gives a solid foundation in best practices and relational theory Covers the latest implementation features in SQL Server 2016 Helps you master in-memory OLTP and use it effectively Takes you from conceptual design to an effective, physical implementation What You Will Learn Develop conceptual models of client data using interviews and client documentation Recognize and apply common database design patterns Normalize data models to enhance scalability and the long term use of valuable data Translate conceptual models into high–performing SQL Server databases Secure and protect data integrity as part of meeting regulatory requirements Create effective indexing to speed query performance Who This Book Is For Programmers and database administrators of all types who want to use SQL Server to store data. The book is especially useful to those wanting to learn the very latest design features in SQL Server 2016, features that include an improved approach to in-memory OLTP, durability enhancements, temporal data support, and more. Chapters on fundamental concepts, the language of database modeling, SQL implementation, and of course, the normalization process, lay a solid groundwork for readers who are just entering the field of database design. More advanced chapters serve the seasoned veteran by tackling the very latest in physical implementation features that SQL Server has to offer. The book has been carefully revised to cover all the design-related features that are new in SQL Server 2016.

Book Beginning T SQL with Microsoft SQL Server 2005 and 2008

Download or read book Beginning T SQL with Microsoft SQL Server 2005 and 2008 written by Paul Turley and published by John Wiley & Sons. This book was released on 2011-01-06 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you've not programmed with Transact-SQL, this book is for you.It begins with an overview of SQL Server query operations and tools used with T-SQL, and covers both the 2005 and 2008 releases of SQL Server query tools and the query editor. The book then moves to show you how to design and build applications of increasing complexity. Other important tasks covered include full text indexing, optimizing query performance, and application design and security considerations. The companion website also provides all of the code examples from the book.

Book Beginning Transact SQL with SQL Server 2000 and 2005

Download or read book Beginning Transact SQL with SQL Server 2000 and 2005 written by Paul Turley and published by John Wiley & Sons. This book was released on 2007-03-07 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning Transact-SQL with SQL Server 2000 and 2005 Transact-SQL is a powerful implementation of the ANSI standard SQL database query language. In order to build effective database applications, you must gain a thorough understanding of these features. This book provides you with a comprehensive introduction to the T-SQL language and shows you how it can be used to work with both the SQL Server 2000 and 2005 releases. Beginning with an overview of the SQL Server query operations and tools that are used with T-SQL, the author goes on to explain how to design and build applications of increasing complexity. By gaining an understanding of the power of the T-SQL language, you'll be prepared to meet the ever-increasing demands of programming. What you will learn from this book How T-SQL provides you with the means to create tools for managing hundreds of databases Various programming techniques that use views and stored procedures Ways to optimize query performance How to create databases that will be an essential foundation to applications you develop later Who this book is for This book is for database developers and administrators who have not yet programmed with Transact-SQL. Some familiarity with relational databases and basic SQL is helpful, and some programming experience is helpful. Wrox Beginning guides are crafted to make learning programming languages and technologies easier than you think, providing a structured, tutorial format that will guide you through all the techniques involved.

Book Pro SQL Server Relational Database Design and Implementation

Download or read book Pro SQL Server Relational Database Design and Implementation written by Louis Davidson and published by Apress. This book was released on 2020-12-14 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn effective and scalable database design techniques in SQL Server 2019 and other recent SQL Server versions. This book is revised to cover additions to SQL Server that include SQL graph enhancements, in-memory online transaction processing, temporal data storage, row-level security, and other design-related features. This book will help you design OLTP databases that are high-quality, protect the integrity of your data, and perform fast on-premises, in the cloud, or in hybrid configurations. Designing an effective and scalable database using SQL Server is a task requiring skills that have been around for well over 30 years, using technology that is constantly changing. This book covers everything from design logic that business users will understand to the physical implementation of design in a SQL Server database. Grounded in best practices and a solid understanding of the underlying theory, author Louis Davidson shows you how to "get it right" in SQL Server database design and lay a solid groundwork for the future use of valuable business data. What You Will LearnDevelop conceptual models of client data using interviews and client documentationImplement designs that work on premises, in the cloud, or in a hybrid approachRecognize and apply common database design patternsNormalize data models to enhance integrity and scalability of your databases for the long-term use of valuable dataTranslate conceptual models into high-performing SQL Server databasesSecure and protect data integrity as part of meeting regulatory requirementsCreate effective indexing to speed query performanceUnderstand the concepts of concurrency Who This Book Is For Programmers and database administrators of all types who want to use SQL Server to store transactional data. The book is especially useful to those wanting to learn the latest database design features in SQL Server 2019 (features that include graph objects, in-memory OLTP, temporal data support, and more). Chapters on fundamental concepts, the language of database modeling, SQL implementation, and the normalization process lay a solid groundwork for readers who are just entering the field of database design. More advanced chapters serve the seasoned veteran by tackling the latest in physical implementation features that SQL Server has to offer. The book has been carefully revised to cover all the design-related features that are new in SQL Server 2019.

Book Beginning T SQL

    Book Details:
  • Author : Kathi Kellenberger
  • Publisher : Apress
  • Release : 2020-12-30
  • ISBN : 9781484266052
  • Pages : 490 pages

Download or read book Beginning T SQL written by Kathi Kellenberger and published by Apress. This book was released on 2020-12-30 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get a performance-oriented introduction to the T-SQL language underlying the Microsoft SQL Server and Azure SQL database engines. This fourth edition is updated to include SQL Notebooks as well as up-to-date syntax and features for T-SQL on-premises and in the Azure cloud. Exercises and examples now include the WideWorldImporters database, the newest sample database from Microsoft for SQL Server. Also new in this edition is coverage of JSON from T-SQL, news about performance enhancements called Intelligent Query Processing, and an appendix on running SQL Server in a container on macOS or Linux. Beginning T-SQL starts you on the path to mastering T-SQL with an emphasis on best practices. Using the sound coding techniques taught in this book will lead to excellent performance in the queries that you write in your daily work. Important techniques such as windowing functions are covered to help you write fast-executing queries that solve real business problems.The book begins with an introduction to databases, normalization, and to setting up your learning environment. You will learn about the tools you need to use such as SQL Server Management Studio, Azure Data Studio, and SQL Notebooks. Each subsequent chapter teaches an aspect of T-SQL, building on the skills learned in previous chapters. Exercises in most chapters provide an opportunity for the hands-on practice that leads to true learning and distinguishes the competent professional. A stand-out feature in this book is that most chapters end with a Thinking About Performance section. These sections cover aspects of query performance relative to the content just presented, including the new Intelligent Query Processing features that make queries faster without changing code. They will help you avoid beginner mistakes by knowing about and thinking about performance from day 1. What You Will Learn Install a sandboxed SQL Server instance for learning Understand how relational databases are designed Create objects such as tables and stored procedures Query a SQL Server table Filter and order the results of a query Query and work with specialized data types such as XML and JSON Apply modern features such as window functions Choose correct techniques so that your queries perform well Who This Book Is For Anyone who wants to learn T-SQL from the beginning or improve their T-SQL skills; those who need T-SQL as an additional skill; and those who write queries such as application developers, database administrators, business intelligence developers, and data scientists. The book is also helpful for anyone who must retrieve data from a SQL Server database.

Book SQL in a Nutshell

    Book Details:
  • Author : Kevin Kline
  • Publisher : "O'Reilly Media, Inc."
  • Release : 2008-11-21
  • ISBN : 0596554257
  • Pages : 595 pages

Download or read book SQL in a Nutshell written by Kevin Kline and published by "O'Reilly Media, Inc.". This book was released on 2008-11-21 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: For programmers, analysts, and database administrators, SQL in a Nutshell is the essential reference for the SQL language used in today's most popular database products. This new edition clearly documents every SQL command according to the latest ANSI standard, and details how those commands are implemented in Microsoft SQL Server 2008, Oracle 11g, and the MySQL 5.1 and PostgreSQL 8.3 open source database products. You'll also get a concise overview of the Relational Database Management System (RDBMS) model, and a clear-cut explanation of foundational RDBMS concepts -- all packed into a succinct, comprehensive, and easy-to-use format. This book provides: Background on the Relational Database Model, including current and previous SQL standards Fundamental concepts necessary for understanding relational databases and SQL commands An alphabetical command reference to SQL statements, according to the SQL2003 ANSI standard The implementation of each command by MySQL, Oracle, PostgreSQL, and SQL Server An alphabetical reference of the ANSI SQL2003 functions, as well as the vendor implementations Platform-specific functions unique to each implementation Beginning where vendor documentation ends, SQL in a Nutshell distills the experiences of professional database administrators and developers who have used SQL variants to support complex enterprise applications. Whether SQL is new to you, or you've been using SQL since its earliest days, you'll get lots of new tips and techniques in this book.

Book SQL and Relational Theory

Download or read book SQL and Relational Theory written by C. Date and published by "O'Reilly Media, Inc.". This book was released on 2011-12-16 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: SQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put the theory into practice. In this insightful book, author C.J. Date explains relational theory in depth, and demonstrates through numerous examples and exercises how you can apply it directly to your use of SQL. This second edition includes new material on recursive queries, “missing information” without nulls, new update operators, and topics such as aggregate operators, grouping and ungrouping, and view updating. If you have a modest-to-advanced background in SQL, you’ll learn how to deal with a host of common SQL dilemmas. Why is proper column naming so important? Nulls in your database are causing you to get wrong answers. Why? What can you do about it? Is it possible to write an SQL query to find employees who have never been in the same department for more than six months at a time? SQL supports “quantified comparisons,” but they’re better avoided. Why? How do you avoid them? Constraints are crucially important, but most SQL products don’t support them properly. What can you do to resolve this situation? Database theory and practice have evolved since the relational model was developed more than 40 years ago. SQL and Relational Theory draws on decades of research to present the most up-to-date treatment of SQL available. C.J. Date has a stature that is unique within the database industry. A prolific writer well known for the bestselling textbook An Introduction to Database Systems (Addison-Wesley), he has an exceptionally clear style when writing about complex principles and theory.

Book What Is Sql

    Book Details:
  • Author : Victor Ebai
  • Publisher : AuthorHouse
  • Release : 2012
  • ISBN : 1477246444
  • Pages : 433 pages

Download or read book What Is Sql written by Victor Ebai and published by AuthorHouse. This book was released on 2012 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: What Is SQL guides beginners, experts, and intermediate readers through the most important aspects of declarative and procedural SQL. Knowledge gained includes the following:  Designing, building, and querying relational databases in the latest versions of oracle and SQL server databases  Performing data-quality operations that eliminate corrupted data from databases  Extending the functionality of SQL using PL/SQL and programmable T-SQL  Building and loading data warehouses without using an expensive ETL tool  Troubleshooting and tuning SQL code and database designs  Extensive use of built-in functions to retrieve and transform data  Translating complex business rules into database constraints  Creating advanced queries that answer complex business questions  Manipulating data within tables  Creating recoverable business transactions  Perform nonstandard SQL operations such as deleting duplicate rows Obtain a free sample of oracle11i and SQL server 2012 databases.

Book Transact SQL Cookbook

    Book Details:
  • Author : Aleš Špetič
  • Publisher : "O'Reilly Media, Inc."
  • Release : 2002
  • ISBN : 1565927567
  • Pages : 305 pages

Download or read book Transact SQL Cookbook written by Aleš Špetič and published by "O'Reilly Media, Inc.". This book was released on 2002 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Transact-SQL Cookbook contains a wealth of solutions to problems that SQL programmers face all the time. The recipes in the book range from how to perform simple tasks, such as importing external data, to how to handle more complicated issues, such as set algebra. Each recipe is followed by a discussion explaining the logic and concepts underlying the solution.

Book SQL Server T SQL Recipes

Download or read book SQL Server T SQL Recipes written by David Dye and published by Apress. This book was released on 2015-07-17 with total page 947 pages. Available in PDF, EPUB and Kindle. Book excerpt: SQL Server T-SQL Recipes is an example-based guide to the Transact-SQL language that is at the core of SQL Server. This edition has been lightly updated for SQL Server 2014 and provides ready-to-implement solutions to common programming and database administration tasks. Learn to create databases, create in-memory tables and stored procedures, insert and update data, generate reports, secure your data, and more. Tasks and their solutions are broken down into a problem/solution format that is quick and easy to read so that you can get the job done fast when the pressure is on. Solutions in this book are divided into chapters by problem domain. Each chapter is a collection of solutions around a single facet of the language such as writing queries, managing indexes, error handling, and query performance. Each solution is presented code-first, giving you a working code example to copy from and implement immediately in your own environment. Following each example is an in-depth description of how and why the given solution works. Tradeoffs and alternative approaches are also discussed. Focused on solutions: Look up what you need to do. Learn how to do it. Do it. Current: Lightly updated for SQL Server 2014 Comprehensive: Covers all common T-SQL problem domains

Book Beginning Transact SQL with SQL Server 2000 and 2005

Download or read book Beginning Transact SQL with SQL Server 2000 and 2005 written by Paul Turley With Dan Wood and published by John Wiley & Sons. This book was released on 2007-08 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning Transact-SQL Programming teaches beginners who have not yet programmed with Transact-SQL. Some familiarity with relational databases and basic SQL is expected, and some programming experience is helpful. The primary audience is database developers; secondary markets include database administrators (DBAs) and business analysts.The book begins with an overview of SQL Server query operations and tools used with Transact-SQL. After a quick review of basic query language commands and syntax, the author quickly moves to show how to design and build applications of increasing complexity. He covers such important tasks as:· Introducing Transact-SQL and Data Management Systems· SQL Server Fundamentals· Tools for Accessing SQL Server· Introducing Transact-SQL Language· Data Retrieval· SQL Functions· Aggregation and Grouping· Multi-Table Queries· Data Transactions· Advanced Queries and Scripting· Full-Text Index Queries· Creating and Managing Database Objects· Transact-SQL Programming Objects· Transact-SQL in Applications and Reporting

Book Relational Database And SQL

    Book Details:
  • Author : Lucy Scott
  • Publisher : Ls Independent Publishing
  • Release : 2022-11-02
  • ISBN : 9781087899695
  • Pages : 0 pages

Download or read book Relational Database And SQL written by Lucy Scott and published by Ls Independent Publishing. This book was released on 2022-11-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces you to the field of relational database development and usage. There are many good books in this field. This book is different. It covers the basics so that beginners can read cover to cover. It is not a book for all levels of readers. For example, this book uses Microsoft SQL Server and Transact-SQL (or T-SQL). It will not mention the different dialect of Oracle or MySQL. If you are interested in Oracle or MySQL, you should use a different book. If you learned SQL Server from this book at your institution and you need to use other DBMS in your future job, the knowledge is only one Google away. This is not a reference book. For example, there are multiple ways to use aliases in T-SQL, but we only use one way. We believe that it is pretty easy to know different ways of using aliases once you finish this book. Why introduce all the different ways of using aliases for the first timer?This book is also unique with over 100 SQL examples and exercises. Most of these examples and exercises are paired. Readers learn one SQL example and can find a corresponding SQL exercise. We believe you have to write the codes in order to show you understood this book. You won't complete this book in 24 hours or 7 days.Even though the book is simple, by the end of the book, readers will be able to apply the knowledge learned to real world projects. We include one project with the detailed process of developing the database and the SQL examples of using the database. This book also includes three case studies readers can practice. This book uses a custom database which is simple with very limited data. The advantage of this approach is that you can manually find the solution before you write the SQL statement (Appendix 2 provides all data of the database). For example, if the question asks for the highest priced deliveries product, you can manually go to Appendix 2 of the book and find the product before you write the SQL statement.Please use Amazon's preview to take a look of the book before purchasing. The third edition includes 343 review questions. We are grateful to Dr. Youlong Zhuang for reviewing this edition.

Book T SQL Querying

    Book Details:
  • Author : Itzik Ben-Gan
  • Publisher : Microsoft Press
  • Release : 2015-02-17
  • ISBN : 0133986624
  • Pages : 865 pages

Download or read book T SQL Querying written by Itzik Ben-Gan and published by Microsoft Press. This book was released on 2015-02-17 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: T-SQL insiders help you tackle your toughest queries and query-tuning problems Squeeze maximum performance and efficiency from every T-SQL query you write or tune. Four leading experts take an in-depth look at T-SQL’s internal architecture and offer advanced practical techniques for optimizing response time and resource usage. Emphasizing a correct understanding of the language and its foundations, the authors present unique solutions they have spent years developing and refining. All code and techniques are fully updated to reflect new T-SQL enhancements in Microsoft SQL Server 2014 and SQL Server 2012. Write faster, more efficient T-SQL code: Move from procedural programming to the language of sets and logic Master an efficient top-down tuning methodology Assess algorithmic complexity to predict performance Compare data aggregation techniques, including new grouping sets Efficiently perform data-analysis calculations Make the most of T-SQL’s optimized bulk import tools Avoid date/time pitfalls that lead to buggy, poorly performing code Create optimized BI statistical queries without additional software Use programmable objects to accelerate queries Unlock major performance improvements with In-Memory OLTP Master useful and elegant approaches to manipulating graphs About This Book For experienced T-SQL practitioners Includes coverage updated from Inside Microsoft SQL Server 2008 T-SQL Querying and Inside Microsoft SQL Server 2008 T-SQL Programming Valuable to developers, DBAs, BI professionals, and data scientists Covers many MCSE 70-464 and MCSA/MCSE 70-461 exam topics

Book SQL Bible

    Book Details:
  • Author : Alex Kriegel
  • Publisher : John Wiley & Sons
  • Release : 2008-04-07
  • ISBN : 0470229063
  • Pages : 890 pages

Download or read book SQL Bible written by Alex Kriegel and published by John Wiley & Sons. This book was released on 2008-04-07 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining theory with everyday practicality, this definitive volume is packed with the up-to-date information, new features, and explanations you need to get the very most out of SQL and its latest standard. The book is unique in that every chapter highlights how the new SQL standard applies to the three major databases, Oracle 11g, IBM DB2 9.5, and Microsoft SQL Server 2008. The result is a comprehensive, useful, and real-world reference for all SQL users, from beginners to experienced developers.

Book The Relational Database Dictionary

Download or read book The Relational Database Dictionary written by C.J. Date and published by "O'Reilly Media, Inc.". This book was released on 2006-08-28 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avoid misunderstandings that can affect the design, programming, and use of database systems. Whether you're using Oracle, DB2, SQL Server, MySQL, or PostgreSQL, The Relational Database Dictionary will prevent confusion about the precise meaning of database-related terms (e.g., attribute, 3NF, one-to-many correspondence, predicate, repeating group, join dependency), helping to ensure the success of your database projects. Carefully reviewed for clarity, accuracy, and completeness, this authoritative and comprehensive quick-reference contains more than 600 terms, many with examples, covering issues and concepts arising from the relational model of data. This one-of-a-kind dictionary provides a single, compact source where DBAs, database designers, DBMS implementers, application developers, and database professors and students can find the accurate definitions they need on a daily basis, information that isn't readily available anywhere else. If you're working with or learning about relational databases, you need this pocket-sized quick-reference.