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Continue to ChatPop quiz answered: "what would be the results of the following queries?" https://code.openark.org/blog/mysql/pop-quiz-answered-what-would-be-the-results-of-the-following-queries
Pop quiz answered: "what would be the results of the following queries?" https://code.openark.org/blog/mysql/pop-quiz-answered-what-would-be-the-results-of-the-following-queries