run
command prompt window run as administrator
net start mysql starts, net stop mysql closes (it seems to start by default when booting)
If mysql is not started, it seems that the mysql application cannot be opened
You can find mysql in the task manager-service to start
The service can be changed to manual (automatic boot and self-start)
Database creation and deletion
SQL language can be used in mysql, and can also be used in other languages
SQL language classification:
Data Definition Language DDL: create, alter, drop
Data manipulation language DML: insert, update, delete, select
Data Control Language DCL: grant, revoke
Create database:
CREATE DATABASE [IF NOT EXISTS] database name (the brackets can be omitted)
[CHARACTER SET character set name] [COLLATE verification rule name] learning character set with uft-8
View the currently included databases show databases The database language ends with ;
Create database create database name;
Manage database
alter database name to modify the character set of this database
drop database name drop database
use name to enter a database and want to switch to another database, use use xxx again,
define table
create table name
(name type
);
example:
create table student
(sno char(4) not null, char(4) can store two Chinese characters
sname char(10), char(10) can store two Chinese characters
ssex char(2)); char(2) can store a Chinese character
a total of three columns
Define data types to save memory space
show tables; View the tables under the current database
desc name; view the structure under the current table
example:
