Solve MySQL 1045 access denied for user 'root' @ 'localhost' (using password: yes)

I have a problem recently , Just can't connect to the backstage mysql database , use navicat Open the database prompt 1045 Access denied for user 'root'@'localhost' (using password: YES). There is a solution to this problem online , But the whole network has copied one person , And did not give exactly what caused the problem . Today, I will explain the reason for this problem and two ways to solve it ！

reason ：

1. The database password has been tampered ！

you 're right , That's why . But many people will immediately refute , My own computer has been working well , How could it be tampered with ？ Hackers are powerful , Tampering with your database password is not the main purpose , The purpose is to enter your database after tampering, back up the database files, and then delete the local database , Threatening you to ask for bitcoin is the main purpose .

2. Database permissions have changed ！

This reason has a lot to do with the change of account permissions of your machine , There are many actual scenarios , No more examples .

Here are two solutions , According to personal preferences, any one can

Method 1 ：

edit mysql The configuration file my.ini（ stay mysql Installation directory , Different computers may be different , Refer to the directory ①D:\Program Files\MySQL\MySQL Server 5.0\my.ini;②C:\ProgramData\MySQL\MySQL Server 8.0\my.ini;）, stay [mysqld] Add... Under this item skip-grant-tables Save, exit and restart mysql

1. open cmd, Click on “ Start ”->“ function ”( Shortcut key Win+R).

2. stop it ： Input net stop mysql

3. start-up ： Input net start mysql

It can also be on the computer - management - Found in the service MySQL Service for , Pictured

At this time cmd In the input mysql -u root -p You can log in without a password , appear password： You can enter when you enter , There will be no ERROR 1045 (28000), But many operations are limited , Because no grant jurisdiction .

Continue to follow the following process ：

1. Get into mysql database ：
mysql> use mysql;
Database changed

2. to root The user sets a new password ：
mysql> update user set password=password(" New password ") where user="root";
Query OK, 1 rows affected (0.01 sec)
Rows matched: 1 Changed: 1 Warnings: 0

3. Refresh database
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

4. sign out mysql：
mysql> quit;
Bye

After being changed , Let me revise it a little bit my.ini This file , Take what we just joined "skip-grant-tables" This line is deleted , Save, exit and restart mysql service , Reuse Navicat Just connect .

Method 2 ：

Uninstall the original database , Including main program 、 Registry and C Disk folder , But you must pay attention to backup C disc C:\ProgramData\MySQL\MySQL Server ( The database version you uninstalled )\data The following database file , This is your previous database table file , To restore the database, you must back it up , Data can be recovered later . Besides , This folder is hidden by default .
Copy data Under the folder, the database you created before , Names are corresponding , You can know which database you created when you have an impression , There are also three files that must be backed up , Look at the picture ：

After backing up these files , Uninstall the original database program and delete the folder and registry , Shut down the database service after reinstalling the database , Put the backup file in the corresponding location , Click to replace those with duplicate names , Then restart the database service . At this time, open the database , You will find that the original database has appeared , It's as like as two peas ！