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MySQL database in the upgrade to version 5.7, and the previous version is somewhat different, there is no data folder, we all know that MySQL database files are saved in the data folder, some people on the Internet said to copy the 5.6 version of the data folder, this argument is not reliable, I also tried, I can indeed log in, but can not change the administrator password, here is a standard solution.

After installing MySQL5.7, open the cmd command window, go to the bin directory in the MySQL installation directory, and enter the following command to enter:

Mysqld-initialize-insecure-user=mysql or enter mysqld-initialize-insecure

After executing the above command, MySQL will create a data folder and set up a default database. The login user name is root, the password is empty, and the later operation is the same as the previous version.

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