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Any suggestion for a comprehensive and advanced SQL course?

As the title implies, I wanted to ask whether you guys have any recommendation for an advanced SQL course. If possible, a free course that can prepare to polish one's SQL skillset for a data scientist career. I've checked edX but I thought it would be more prudent to ask for others' opinions rather than exploring through all of the courses. Your opinion would be greatly appreciated.

12th Jul 2018, 7:45 AM
Joshua Choi
Joshua Choi - avatar
1 Odpowiedź
+ 24
You can find the advanced SQL course on www.w3schools.com
12th Jul 2018, 7:49 AM
Igor Makarsky
Igor Makarsky - avatar