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Speed up queries with the cost-based optimizer in Amazon Athena

AWS Big Data

Doing it before risks unnecessary aggregation overhead because each value is likely unique anyway and that step will not result in an earlier reduction in the amount of data transferred between intermediate stages. Analytics Architect on Amazon Athena. He has been working on query optimizers for over a decade.

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Data science vs. machine learning: What’s the difference?

IBM Big Data Hub

While data science and machine learning are related, they are very different fields. In a nutshell, data science brings structure to big data while machine learning focuses on learning from the data itself. What is data science? This post will dive deeper into the nuances of each field.

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IT leaders adjust budget priorities as economic outlook shifts

CIO Business Intelligence

Security tops the list According to this year’s State of the CIO survey , cybersecurity and risk management are the top investment areas for 45% of IT leader respondents. Focus on risk management, he advises, and “have a little faith in your CFO and CEO. Another investment area includes tools given to sales agents.

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Themes and Conferences per Pacoid, Episode 12

Domino Data Lab

Consider the following timeline: 2001 – Physics grad students are getting hired in quantity by hedge funds to work on Wall St. to join data science teams, e.g., to support advertising, social networks, gaming, and so on—I hired more than a few. 2018 – Global reckoning about data governance, aka “Oops!