How to Use MySQL User Variables for Cumulative Daily User Counts

This article explains how to calculate cumulative daily user totals in MySQL using user-defined variables, demonstrates the necessary SQL queries, compares them with a Java‑style algorithm, and highlights important considerations such as variable initialization and practical pitfalls.

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How to Use MySQL User Variables for Cumulative Daily User Counts

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Jun 6, 2016 · Big Data

Spark and MongoDB Tutorial: Daily Active User Statistics with Scala

This tutorial guides readers through using Apache Spark and MongoDB to compute daily active user statistics, covering Spark fundamentals, a Spark‑vs‑Hadoop comparison, MongoDB use cases, environment setup, Scala code workflow, Maven compilation, and job submission on a YARN cluster.

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Spark and MongoDB Tutorial: Daily Active User Statistics with Scala