How to define an auto increment primary key in PostgreSQL
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To define a primary key that auto increments in PostgreSQL you create the table row using the SERIAL
type with the PRIMARY KEY
constraint, like this:
CREATE TABLE cars (
id SERIAL PRIMARY KEY,
brand VARCHAR(30) NOT NULL,
model VARCHAR(30) NOT NULL,
year CHAR(4) NOT NULL
);
In MySQL / MariaDB this is equivalent to
CREATE TABLE cars (
id INT(11) NOT NULL AUTO_INCREMENT,
brand VARCHAR(30) NOT NULL,
model VARCHAR(30) NOT NULL,
year CHAR(30) NOT NULL,
PRIMARY KEY (`id`)
);
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