MD5 learning

What is? MD5： Information summarization algorithm 5 generation
It mainly enhances the complexity and irreversibility of the algorithm
MD5 Irreversible , Specific value md5 It's the same
MD5 To crack the website , There is a dictionary behind it , Brute force

create table testmd5
(
	id int(4)not null ,
	name varchar(20) not null,
	pwd varchar(50) not null,
	primary key (id)
)engine=InnoDB default charset = utf8;
-- insert data 
insert***
-- encryption 
update testmd5 set pwd=MD5(pwd)
-- Generally, it is encrypted when inserting 
insert into testmd5 values(3,'wangwu',MD5('123456'))
-- How to check ： Secrets passed in by users , Conduct md5 encryption , Then compare the encrypted values 
select * from testmd5 where name='wangwu' and pwd=MD5('123456')