Will take place at 10am on Thursday, July 16th in Don Genaro 2: https://wikimania2015.wikimedia.org/wiki/Hackathon#Hackathon_Day_2
Teach people the basics of writing SQL queries using Quarry. This will be a training session where we show examples of various kinds of interesting questions you can answer about Wikimedia projects using SQL.
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Went great! Very clear. Capt_Swing presented very helpfully and walked us through the basics. Everyone could try queries on their own computer as he spoke so it was easy to remember, build, and focus on subject of our own interest.
Quarry's ingenious -- We can see other people's queries and learn from them how to specify a query without bothering them. Quite nice feature also for the teaching session so we don't all have to get the syntax right immediately by ourselves. Thank you yuvipanda!