Chapter 15 MySQL user management

Section 1 ： Login and roll out mysql The server

start-up mysql After the server , You can use mysql Command to log in mysql The server , The order is as follows ：

mysql -h hostname|hostip -P port -u username -p DatabaseName -e "sql sentence "

Several parameters of this command are as follows :

-h The parameter is followed by the host name or host IP,hostname The host name is ,hostip Host computer IP

-P Parameters are followed by Mysql Port of service , Log in to Mysql Designated port .mysql The default port of the service is 3306, Automatically connect to... When this parameter is not applicable 3306 port ,port Is the port number of the connection .

-u Parameter followed by user name .username Is the user name .

-p The parameter will prompt the user to enter the password （ After entering this statement, you will be prompted to enter the password window ）

-e Parameters can be directly followed by mysql sentence . Sign in mysql This can be executed immediately after the server SQL sentence , And then quit mysql The server .

Let's start with a simpler ：

stay win Enter... On the command line :

mysql -h localhost -uroot -p

The following -h Replace it with the host ip, as follows ：

Let's have another one by ourselves ：

 

mysql perform ：

mysql -h127.0.0.1 -uroot -P 3306 mysql -e "select * from db" -p 

  It can be seen that , If there is -e Options , Then run this statement immediately after logging into the database , It was launched immediately after the operation mysql The server .

In the second quarter ：mysql New normal user

1. use CREATE USER To create users ：

mysql use CREATE USER To create new users （ Of course there must be CREATE USER jurisdiction ）.CREATE USER The basic grammatical structure of is as follows ：

  for example ： Execute the following statement to create a user ：user1, The password is user1

CREATE USER 'user1'@'localhost' identified by 'user1';

After executing the above statement , Try logging in ： 

The result shows that login succeeded .

2. Try to use insert Command to create a user ：