几个MySql的面试题
MySQL, 数据库
- 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 MySQL?
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