Isn't the ID primary key auto-incrementing? Why do we need to add null?

Question

insert into stu values ​​(null,'jike','ww',55)

Why should the id field be null when inserting? Can it not be written? I tried it, but it doesn't work! Since it is Why can't it be done without writing the self-increasing number?

Answer 1

insert into my_table (field 1, field 2....) values ​​(...), this insertion method can be omitted without writing the primary key field name, insert into mytable values ​​(), this kind of insertion requires each field to be There must be a value entered, otherwise, sorry, there is an error.