SKU: 12934618231

SQL Queries For Mere Mortals: A Hands-On Guide To Data Manipulation In SQL

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SQL Queries For Mere Mortals: A Hands-On Guide To Data Manipulation In SQLSQL Queries For Mere Mortals: A Hands On Guide To Data Manipulation In SQL The #1 Easy, Common Sense Guide to SQL QueriesUpdated 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

SQL Queries For Mere Mortals: A Hands-On Guide To Data Manipulation In SQL

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!

SPECIFICATIONS:

Author:John L. Veskas - Джон Л. Виескас

Publisher:Longman (Pearson Education)

Language:English

Publication Date:2018

Format:Paperback

Width:178 mm / 7'

Height:231 mm / 9,1'

Weight:1480 g

ISBN:9780134858333

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SKU: 12934618231

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E. A. Baptist
Bozeman, US
★★★★★ 4
Makes a difference but maybe only to caffeine addled coffee snobs
Color: Black
I won't say that everyone urgently needs one of these. This is helped me up my game. Perhaps not absolutely necessary, but it noticeably reduces canalization and improves extraction. And it appears to have improved not only my espresso, but my pour-overs and my Mokapot (especially the Mokapot!). It's a little fiddley to assemble - there's sets of springs and needles - but once you get it all locked down, its very tight. There's a set of spares - I can't imagine needing them. The tool kinda sits in the weighted base, but it appears to stay put in my cabinet.
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Reviewed in the United States on May 24, 2026
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David J.
Cuba, US
★★★★★ 5
Excellent espresso tool
Color: Black
Very nicely made and works as intended. Also comes with extra needles. Highly recommend.
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Reviewed in the United States on May 17, 2026
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JP Richardson
Natrona Heights, US
★★★★★ 5
WDT Tool: The Needle in My Espresso Haystack
Color: Black, Color: Black
I kind of went down a deep dive researching these WDT (Weiss Distribution Technique) tools, and I have to say, this one hits the sweet spot! The needle size is just right, and the shape is spot on for what I need. Plus, it’s a nice perk that you can remove and replace the needles. I’ve tried using needles and bobby pins in the past, but they were too thick and just ended up creating their own channels—talk about a brewing disaster! Now, here’s the twist: even though it comes with seven needles installed (and more replacements), I find it a bit overkill. With all those needles, it just traps the grinds in the center, pushing stuff around like it’s playing a game of “don’t let the coffee escape.” So, I stick with just three needles in a triangle formation for optimal distribution. Pro tip: don’t forget to adjust the depth as you use it to ensure you’re getting the best coverage of your coffee grounds! The build quality is actually pretty impressive. It feels like well-constructed metal components that could survive a small espresso war. Plus, it's more affordable than some of those fancy options out there—because who needs a second mortgage for great coffee? It looks quite nice on my counter, and the little stand is a handy extra touch. Overall, if you’re looking to up your espresso game and avoid the chaos of uneven distribution, this WDT tool is worth considering. Just remember: less is sometimes more when it comes to needles!
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Reviewed in the United States on October 20, 2024
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Victoria Hawkins
Lexington, US
★★★★★ 5
Love this thing!!!
Color: Black, Color: Black
Hey, coffee lovers! ☕️ I recently got my hands on the WDT Espresso Distribution Tool Espresso Stirrer Tools for Barista, and let me tell you, it's a game-changer! 🙌 I'm absolutely thrilled with this amazing tool and can't recommend it enough to fellow coffee enthusiasts and professional baristas alike. First things first, the build quality of this espresso stirrer is top-notch! 💪 The aluminum alloy handle not only adds durability but also gives it a sleek and professional look, especially in the matte black finish. Holding this tool feels great, and the ergonomic design ensures a comfortable grip even during those long brewing sessions. The 0.35mm 7 needles are perfectly spaced, allowing for precise and consistent distribution of coffee grounds in the portafilter. This means a more even extraction and an enhanced flavor profile in every sip. And guess what? You get 7 extra replaceable needles as a bonus! 🎉 This ensures the longevity of the tool and easy replacement when needed. But wait, there's more! The included stand is a fantastic addition to this package. 🎁 It not only serves as a convenient storage solution but also adds a touch of elegance to my coffee setup. No more rolling around and cluttered workspace. Everything stays in place, thanks to the stand! Using the WDT Espresso Distribution Tool is a breeze! ⚡️ The precisely engineered needles and ergonomic design make it effortless to distribute the coffee grounds evenly. Whether you're a pro barista or a home brewing enthusiast, this tool will take your espresso game to new heights. Trust me on this one! In conclusion, the WDT Espresso Distribution Tool Espresso Stirrer is an absolute must-have for any coffee lover out there. 💯 Its top-notch build quality, precision, and thoughtful design will bring joy to your coffee routine. So, don't wait any longer! Treat yourself and elevate your espresso-making experience with this amazing tool. Cheers! 🥳☕️
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Reviewed in the United States on June 12, 2023
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Johnson Phan
Port Orchard, US
★★★★★ 5
Easy to use and affordable - great value for money!
Color: Black
I recently purchased the Nessus WDT Espresso distribution tool and I am thoroughly impressed with its performance. Assembling it was a breeze, and it came with extra needles which is always a plus. The tool is easy to clean, which is important to me because I like to keep my equipment in top condition. The price was very fair compared to other similar products on the market, making it an even better value for money. One thing that really stood out to me was the brush that collects the coffee grounds. It's incredibly easy to clean, which makes maintenance a breeze. I've had my share of espresso machines in the past, and I can tell you that this one is a keeper. I would definitely recommend it to anyone looking for a high-quality distribution tool at an affordable price
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Reviewed in the United States on December 16, 2025

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