幾個MySql的筆試題

時間:2020-11-25 18:18:50 筆試題目 我要投稿

幾個MySql的筆試題

  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?

幾個MySql的筆試題

  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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