Basic usage of common MySQL statements

The following articles mainly describe the basic usage of common MySQL statements. First, we will introduce the basic usage of common MySQL statements by adding users. The following is a detailed description of the article, I hope you will understand the actual application after browsing.

1. Add a user

 
 

  
  
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;  
  
  
flush privileges; 
 
 

2. remote connection

 
 

  
  
use MySQL;   
  
  
update user set host='%' where user='root'; 
 
 

3.

 
 

  
  
MySQL -u root MySQL   
  
  
MySQL> UPDATE user SET Password = PASSWORD('newpwd')   
  
  
-> WHERE User = 'root';   
  
  
MySQL> FLUSH PRIVILEGES;  
 
 

This statement is required to take effect in common MySQL statements.

4. Create an index:

 
 

  
  
MySQL> alter table name add index (field );
  
  
MySQL> alter table name add primary key (field );
  
  
MySQL> show columns from table name;
 
 

Except index:

 
 

  
  
MySQL> alter table Name drop index field;
  
  
MySQL> alter table Name drop primary key field;
  
  
MySQL> show columns from table name;
 
 

5. Backup

 
 

  
  
MySQL\bin>MySQLdump -u root -proot orapp > back.sql 
 
 

The above content is an introduction to common MySQL statements.

The above content describes common MySQL statements, hoping to help you in this regard.