更新 '_posts/Mysql.md'

_posts/Mysql.md

@@ -2,6 +2,7 @@
 title: MYSQL
 date: 2020-06-15
 tags: Mysql
+cover: https://static.jqwei.com/blog/img/IMG_3462.PNG
 categories: 数据管理
 ---
 <div align=center><h2>MYSQL相关</h2></div>