Set to change root password:
The default password is blank.
Set root password:
The known root password is to modify the root password of mysql:
If you forget your password, you can add the following line to vim /etc/my .cnf to ignore the authorization service and log in to mysql directly. After modifying the file, you need to restart mysql systemctl restart mariadb=restart the database
The following is to log in directly after modifying the file.
Connect to mysql:
connect to local database
Specify the database to connect to remotely
Display all libraries after connecting to mysql
MySQL common commands:
show databases query has all the libraries
Switch the library use mysql mysql= this time is equal to the name of the library, the name can be modified
show tables; query the tables in the library
desc + (the name of the table); query the fields in the table
show create table (the name of the table)\G; View the statement that created the table
select user(); view the current user
select database(); View the currently used database
MySQL common commands:
create database (name of library) Create a library
create table (table name) (`id` int(4), `name` char(40)); backticks are required to create a table
show create table (table name)\G; View the format of the created table show=view
drop table (tablename); drop table drop=drop
select version(); View the current database version
show status; view the status of the database
View the parameters: show variables; View the specified parameters: show variables like 'max_connect%' ;
Modify parameters: set global max_connect_errors=1000 ;
View the queue: show processlist; View the queue in full: show full processlist ;
expand
mysql5.7 root password change http://www.apelearn.com/bbs/thread-7289-1-1.html
myisam and innodb engine comparison http://www.pureweber.com/article/myisam-vs-innodb/
Detailed explanation of mysql configuration: http://blog.linuxeye.com/379.html
mysql tuning: http://www.aminglinux.com/bbs/thread-5758-1-1.html
personal mysql tuning experience shared by students : http://www.apelearn.com/bbs/thread-11281-1-1.html