mysql basic CRUD operations

How to use the terminal to operate the database

How to log database

mysql -u用户名　-p密码

such as:

mysql -uroot -p123456

How to query the database server for all databases

show databases;

How to select a certain database operations

use 你要操作的数据库；

such as

use sys;

sql statement query

select * from 你要查询的选中数据库里的内容

Tip: If the selected database is not what you want to query are displayed

Table 'sys.sys' doesn't exist

Query by the conditions such as querying data id = 1

select *from admin where Admin_ID=1;

How to exit the database server

exit;

How to create our server in the database server

create database test;

(Creates a database named test)

How to view the selected data tables inside the database

show tables;

How to create a data table

Create a pet such as a data table

create table pet (
name varchar(20),
owner varchar(20),
species varchar(20),
sex char(1),
birth DATE,
death DATE);

Check the created data table details

describe pet;

How to view the recorded data in the table?

select * from pet;

How to add data record to the data table?

insert into pet
values('puffball','diane','hamseter','f','1999-03-30',NULL);

mysql common data types

Numerical

Date / Time

String type

How to choose the type of data

Select the date in the format

Values ​​according to the size and the string

How to remove data

delete from pet where name='wangcai';

How to modify the data

update pet set owner='bababa' where name='wangcai';

to sum up

Increase insert

Delete delete

Modify update

Query select