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mysql_chats.txt

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WWill Carter
Last edited Feb 10, 2021
Created on Feb 10, 2021

The example demonstrates how to extract the timestamp of the last significant interaction for each client from a MySQL chat log, where significance is defined as an interaction lasting at least 30 seconds. It shows a SQL query that parses message commands (`@startVideo`/`@stopVideo`) to group messages into interactions, calculates durations, and filters for those meeting the threshold. The query uses common table expressions (CTEs) and window functions like `LEAD` and `ROW_NUMBER` to identify interaction boundaries and select the final `@stopVideo` timestamp per client, ordering results alphabetically by client name. The data originates from a gist by FergusDevelopmentLLC, with the schema and sample inserts provided in the file.

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