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SQL Queries for Mere Mortals de John Viescas

SQL Queries for Mere Mortals: For Mere Mortals

Autor John Viescas
en Limba Engleză Paperback – 19 apr 2018

Diferența majoră între SQL Queries for Mere Mortals și documentația tehnică standard rezidă în metodologia „common-sense” care prioritizează logica seturilor în detrimentul simplei memorări de sintaxă. În această a 4-a ediție, John L. Viescas extinde manualul clasic cu tehnici avansate, fără a sacrifica claritatea care a consacrat seria For Mere Mortals. Notăm cu interes includerea funcțiilor fereastră și a calculelor agregate complexe, instrumente esențiale pentru raportarea modernă. Structura volumului este riguros progresivă. Primele trei părți stabilesc fundamentul teoretic al modelului relațional și operarea cu instrucțiuni SELECT, JOIN și UNION. Ulterior, progresia trece spre manipularea seturilor de date (INSERT, UPDATE, DELETE), culminând cu Partea a VI-a, dedicată „problemelor dificile”. Aici găsim soluții practice pentru logica booleană complexă și utilizarea tabelelor de tip „driver”. Această organizare permite utilizatorului să valideze mai întâi structura bazei de date (Capitolul 2) înainte de a trece la interogări sofisticate. Cititorul care a parcurs SQL Primer de Rahul Batra pentru a înțelege conceptele de bază va găsi aici platforma ideală pentru scalarea competențelor. În timp ce SQL Primer oferă o introducere agnostică, lucrarea lui Viescas aprofundează scenarii de tip „outside the box”, cum ar fi utilizarea tabelelor neconectate pentru analize complexe. Găsim în acest volum un echilibru între teorie și practică, susținut de fișiere de test descărcabile pentru cele mai populare sisteme: SQL Server, MySQL și PostgreSQL.

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Specificații

ISBN-13: 9780134858333
ISBN-10: 0134858336
Pagini: 960
Dimensiuni: 178 x 232 x 51 mm
Greutate: 1.61 kg
Ediția:4. Auflage
Editura: Pearson Education (US)
Colecția For Mere Mortals
Seria For Mere Mortals

De ce să citești această carte

Recomandăm această carte oricărui analist de date sau dezvoltator care dorește să treacă de la interogări simple la soluții profesionale de raportare. Veți câștiga o înțelegere profundă a funcțiilor fereastră și a grupărilor avansate, elemente care separă un utilizator ocazional de un specialist. Este un ghid practic, independent de platformă, care pune accent pe eficiența logică a codului SQL.

Despre autor

John L. Viescas este un consultant independent cu o carieră de peste 40 de ani în domeniul bazelor de date. Și-a început activitatea ca analist de sisteme, proiectând aplicații complexe pentru sisteme mainframe IBM. A deținut funcții de conducere la Applied Data Research, unde a coordonat echipe de cercetare și dezvoltare de produs. Expertiza sa vastă, acumulată în decenii de lucru cu tehnologii diverse, de la Tandem Computers la ecosistemul Microsoft, transformă scriitura sa într-o resursă tehnică de încredere pentru comunitatea IT.

Descriere

The #1 Easy, Common-Sense Guide to SQL Queries―Updated with More Advanced Techniques and Solutions

Foreword by Keith W. Hare, Vice Chair, USA SQL Standards Committee

SQL Queries for Mere Mortals has earned worldwide praise as the clearest, simplest tutorial on writing effective queries with the latest SQL standards and database applications. Now, author John L. Viescas has updated this hands-on classic with even more advanced and valuable techniques.

Step by step, Viescas guides you through creating reliable queries for virtually any current SQL-based database. He demystifies all aspects of SQL query writing, from simple data selection and filtering to joining multiple tables and modifying sets of data.

Building on the basics, Viescas shows how to solve challenging real-world problems, including applying multiple complex conditions on one table, performing sophisticated logical evaluations, and using unlinked tables to think “outside the box.”

In two brand-new chapters, you learn how to perform complex calculations on groups for sophisticated reporting, and how to partition data into windows for more flexible aggregation.

Practice all you want with downloadable sample databases for today’s versions of Microsoft Office Access, Microsoft SQL Server, and the open source MySQL and PostgreSQL databases. Whether you’re a DBA, developer, user, or student, there’s no better way to master SQL.

Coverage includes:

  • Getting started: understanding what relational databases are, and ensuring that your database structures are sound
  • SQL basics: using SELECT statements, creating expressions, sorting information with ORDER BY, and filtering data using WHERE
  • Summarizing and grouping data with GROUP BY and HAVING clauses
  • Drawing data from multiple tables: using INNER JOIN, OUTER JOIN, and UNION operators, and working with subqueries
  • Modifying data sets with UPDATE, INSERT, and DELETE statements
  • Advanced queries: complex NOT and AND, conditions, if-then-else using CASE, unlinked tables, driver tables, and more
  • NEW! Using advanced GROUP BY keywords to create subtotals, roll-ups, and more
  • NEW! Applying window functions to answer more sophisticated questions, and gain deeper insight into your data

Software-Independent Approach!
If you work with database software such as Access, MS SQL Server, Oracle, DB2, MySQL, Ingres, or any other SQL-based program, this book could save you hours of time and aggravation―before you write a single query!

Notă biografică

John L. Viescas is an independent database consultant with more than 50 years of experience. He began his career as a systems analyst, designing large database applications for IBM mainframe systems. He spent 6 years at Applied Data Research in Dallas, Texas, where he directed a staff of more than 30 people and was responsible for research, product development, and customer support of database products for IBM mainframe computers. While working at Applied Data Research, John completed a degree in business finance at the University of Texas at Dallas, graduating cum laude.

John joined Tandem Computers, Inc., in 1988, where he was responsible for the development and implementation of database marketing programs in Tandem's U.S. Western Sales region. He developed and delivered technical seminars on Tandem's relational database management system, NonStop SQL. John wrote his first book, A Quick Reference Guide to SQL (Microsoft Press, 1989), as a research project to document the similarities in the syntax among the ANSI-86 SQL standard, IBM's DB2, Microsoft's SQL Server, Oracle Corporation's Oracle, and Tandem's NonStop SQL. He wrote the first edition of Running Microsoft Access (Microsoft Press, 1992) while on sabbatical from Tandem. He has since written four editions of Running, three editions of Microsoft Office Access Inside Out (Microsoft Press, 2003, 2007, and 2010-the successor to the Running series), Building Microsoft Access Applications (Microsoft Press, 2005), and Effective SQL (Addison-Wesley, 2017).

John formed his own company in 1993. He provides information systems management consulting for a variety of small to large businesses around the world, with a specialty in the Microsoft Access and SQL Server database management products. He maintains offices in Nashua, New Hampshire, and Paris, France. He was recognized as a "Most Valuable Professional" (MVP) from 1993 to 2015 by Microsoft Product Support Services for his assistance with technical questions on public support forums. He set a landmark 20 consecutive years as an MVP in 2013.
You can visit John's Web site at www.viescas.com.

Cuprins

  • Part I: Relational Databases and SQL
  • Chapter 1: What Is Relational?
  • Chapter 2: Ensuring Your Database Structure Is Sound
  • Chapter 3: A Concise History of SQL
  • Part II: SQL Basics
  • Chapter 4: Creating a Simple Query
  • Chapter 5: Getting More Than Simple Columns
  • Chapter 6: Filtering Your Data
  • Part III: Working with Multiple Tables
  • Chapter 7: Thinking in Sets
  • Chapter 8: INNER JOINs
  • Chapter 9: OUTER JOINs
  • Chapter 10: UNIONs
  • Chapter 11: Subqueries
  • Part IV: Summarizing and Grouping Data
  • Chapter 12: Simple Totals
  • Chapter 13: Grouping Data
  • Chapter 14: Filtering Grouped Data
  • Part V: Modifying Sets of Data
  • Chapter 15: Updating Sets of Data
  • Chapter 16: Inserting Sets of Data
  • Chapter 17: Deleting Sets of Data
  • PART VI Introduction to Solving Tough Problems
  • Chapter 18 “NOT” And “AND” Problems
  • Chapter 19 Condition Testing
  • Chapter 20 Using Unlinked Data and “Driver” Tables
  • Chapter 21 Performing Complex Calculations on Groups
  • Chapter 22: More SQL Server Complex Problems to Solve
  • APPENDICES
  • Appendix A: SQL Standard Diagrams
  • Appendix B: Schema for the Sample Databases
  • Appendix C: Date and Time Functions
  • Appendix D: Suggested Reading