10 questions on MySQL speed-up and optimizations

Jay Pipes, author of Pro MySQL, on his blog posts 10 questions and answers dealing with MySQL speed optimizations. Which will be faster out of these two queries - one with OR or one with IN? Where does MyISAM cache table records? Which will be faster out of queries with explicit INNER JOIN and implicit one? Is InnoDB faster/better than MyISAM? Is CHAR faster than VARCHAR? Is VARCHAR(80) faster than VARCHAR(255)? Are there performance issues when joining tables from different storage engines? If I change a derived table to a view, will performance increase? If I see Using temporary; Using filesort” in the Extra column of EXPLAIN output, does that mean a temporary table is created on disk? Is it possible to do a FULL OUTER JOIN in MySQ...

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