For a long time did not play a simple sql to review the case, really afraid someday amnesia QAQ
Switch to administrator
sudo -s
Log database , enter the password
mysql -u root -p
View all databases
show databases;
Create a database
create database web02;
Delete Database
drop database web03;
Use Database
use web02;
View current database used
select database();
Create a database table
create table user(id int primary key auto_increment,username varchar(16),password varchar(16));
Create a user table, the above mentioned id as the primary key, use the integer, and increment, username and password are used 16 space to store the size of the characters
To delete a database table
drop table user;
View database tables structure
desc user ;
Inserting data into a database table
insert into user values (null,”siki”,”123”);
Inserted into a database table id increment, user name Siki, password 123 recorded
Inserting data into the database table (key pairing mode)
Insert into user(username,password) values(‘Jack’,’123456’);
To the user to insert a table username is Jack , password is 123456 records
All recorded data table view
select * from user ;
Delete all records in a database table
delete from user;
Delete database records specified in the table
Delete from user where id = 3;
Delete user database table id as 3 record
Renaming database tables
Rename table user user to myuser;