更新 '_posts/Mysql.md'

_posts/Mysql.md

@@ -1,7 +1,6 @@
 ---
 title: MYSQL
 date: 2020-06-15
-cover: https://static.jqwei.com/blog/img/text/2.png
 tags: Mysql
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 <div align=center><h2>MYSQL相关</h2></div>