I have this code in PostgreSQL

CREATE TABLE first (

id serial,

primary key(id)

);

CREATE TABLE second (primary key(id)) INHERITS (first);

What is the equivalent code for MySQL?

解决方案

MySQL does not support table inheritance. The only way to approximate the functionality is by using a foreign key (which MySQL isn't too good at either):

CREATE TABLE first (

id serial,

PRIMARY KEY (id)

);

CREATE TABLE second (

parent integer REFERENCES first,

PRIMARY KEY (parent)

);

Obviously, you'd have to change any views and queries from the PostgreSQL "inheritance version" to regular multi-relation queries.