MySQL5.7 啓動報錯:initialize specified but the data directory has files in it. Aborting.

http://www.javashuo.com/article/p-texotbfo-ht.html 剛安裝好的MySQL5.7.12，執行service mysqld start時報錯，內容如下：  2017-02-19T07:52:53.807647Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please

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