grammar operation of mysql

Start the service:

net start mysql

Connection authentication syntax:

mysql -h localhost -p 3306 -u root -p

Close the service:

net stop mysql

Create the database:

create database 数据库名;

Create a database with library options:

create database 数据库名 charset gbk;

Select the database:

use 数据库名;

View the database creation statement:

show create database 数据库名;

Show all databases:

show databases;

Show all databases starting with my:

show databases like 'my%';

Show databases ending in bases:

show databases like '%bases';

Modify the database character set:

alter databases 数据库名 charset gbk;

Delete the database:

drop database 数据库名;

Create a table:

create table 表名(
	字段名 int,
	字段名 varchar(10)
);

Create a table with table options:

create table 表名(
	字段名 int,
	字段名 varchar(10)
)charset gbk;

Display all tables of the current library:

show tables;

View the table structure:

desc 表名;

View all tables starting with a:

show tables like 'a%';

Display table creation statement:

show create table 表名;

Copy table structure:

create table 表名2 like  表名1;

Modify the character set of the table:

alter table 表名 charset utf8;

Modify the table name:

rename table 原表名 to 新表名;

Add a new field to the table (on top):

alter table 表名 add 字段名 int[类型] first;

Add the name field to the table after the id field:

alter table 表名 add name char(10) after id;

Modify the field name, change the age field to id:

alter table 表名 change age id int;

Modify the name field type:

alter table 表名 modify name char(20);

Delete field:

alter table 表名 drop 字段名;

Delete a table:

drop table 表名;

Delete multiple tables (not allowed):

drop table 表1,表2；

Insert 1 piece of data into the table:

insert into 表名(id,name)values(1,"张三");

Insert multiple pieces of data into the table:

insert into 表名 values(1,'张三'),(2,'李四')；

View all the information of the table:

select * from 表名;

Query the name and age of the student form:

select name,nl from stu;

Query the student information named Zhang San:

select * from stu where name="张三";

Delete the student information named Zhang San:

delete from stu where name="张三";

Change the id of Zhang San to 3:

update stu set id=3 where name="张三";

Set the unified character set:

set names gbk/utf8;

Increase the primary key 1:

create table 表名(
	id int primary key,
	name char(20)
)charset gbk;

Increase the primary key 2:

create table 表名(
	id int,
	name char(20),
	primary key(id)
)charset gbk;

Add the primary key after the table:

alter table 表名 add primary key(字段名);

Delete the primary key:

alter table 表名 drop primary key;

Add automatic growth:

create table 表名(
	id int primary key auto_increment,
	name char(10) not null
)charset gbk;

Modify automatic growth:

alter table 表名 auto_increment=值;

Create a unique key:

alter table 表名add unique key(字段名);

Delete the unique key:

alter table 表名 drop index 唯一键名字;

All data in the query table:

select * from 表名;

Some fields in the query table:

select 字段列表 from 表名;

Conditional query data:

select 字段列表 * from 表名 where 字段名=值；

Delete operation:

delete from 表名 【where条件】;

Update operation:

update 表名 set 字段名=新值 【where条件】;