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Comments and questions from readers...
Hi, I find the SQL website to be really helpful, and I am gaining a lot of insight. However, it seems like the nested select doesn't work, even when I try running the example. Hopefully, I make you aware of this glitch.Sincerely, Rachmad Tjachyadi
Andrew responds explaining why this happens and what we can do about it.
Bob Brooks writes...I am learning Sql using your tutorial and I thank you for it. It is extremely easy to use. I believe your answer to 2b is wrong. You only count countries with a population of 10 million. If a region has no countries of 10 million, that region is not listed. It should be listed with a count of zero. I'm having trouble coming up with that answer.Bob BrooksSan Diego, Ca |
2b (tutorial 3) asks...For each region show the region and number of countries with populations of at least 10 million. |