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# NEW book by Seth J. Chandler—Query: Getting Information from Data with the Wolfram Language

Posted 7 months ago
 Seth Chandler has a new book coming out tomorrow from Wolfram Media! Mathematica and the Wolfram Language provide an integrated environment for sophisticated programming, making them the ideal tools for calculus, data visualization, machine learning, and more. But how about using Wolfram as the linchpin for organizing data? In this book, Professor Seth J. Chandler, an award-winning, 30-year user of the Wolfram Language, guides intermediate users from simple cases to data in the wild and shows how each can be fed into the full range of Wolfram Language functionality. It's both a conceptual and practical approach filled with annotated examples. Want to know more about associations or the organization and presentation of datasets? This book shows how it's done. Want to organize or reduce data in the Wolfram Language similarly to the way one might use SQL, pandas in Python, or dplyr in R's tidyverse? This book shows how to simplify data processing and go beyond what is possible with other tools using the Query function. It also explores how to import information from the places real-world data is most likely to be found: CSV, Excel, or JSON files.
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Posted 4 months ago
Posted 4 months ago
 Thanks for the question! I'll let Seth Chandler know, but in case he doesn't get a chance to answer before the webinar, feel free to bring your question along this Friday!
Posted 4 months ago
 Thanks for the question. I hope you are able to attend the Webinar. As an initial matter, something is strange with your code. In response to this: Query[All, KeyDrop["class"]]@titanic You are getting an answer that is grouped by class. Perhaps you could submit your entire notebook.One quick point, though.KeyDrop[#class]& is not a correct operator. You can see this by running the following f29 = Normal@titanic[[1]] This gives us a single Association. If you now run KeyDrop[#class]&[f29] You get KeyDrop["1st"], which is not what you intend.
Posted 4 months ago
 Dear Seth, Thank you for your reply. My apologies, the GroupBy operator went missing after copy-paste and I discovered that my first example was invalid. I will replace and rephrase my question as a notebook.I will join next Friday's webinar 15 minutes later. Looking forward to seeing you there.
Posted 4 months ago
 Wolfram U is pleased to welcome Seth Chandler as featured speaker at an author talk on Friday, December 8, 12pm CT. It's free and online! See details and reserve your spot here: https://www.bigmarker.com/wolfram-u/query-book-author-talk-seth-chandler
Posted 7 months ago
 Thanks for sharing and thanks to Seth Chandler for writing this book. I was awaiting the completion of this book :)
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