问题
PS E:\node-exclude\mysql5.7\mysql-5.7.42-winx64\bin> mysql_upgrade -u root -p --force
Enter password: ****
Error occurred: Cannot select database.
![](https://img-blog.csdnimg.cn/675ca8829aff49c281e0bfaf63337c52.png)
解决
![](https://img-blog.csdnimg.cn/7e730f67415e4a42b2bbbf35765db8f3.png)
show_compatibility_56 = ON
performance_schema
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