SQL

postgres autoincrement primary key

CREATE TABLE epictable
(
    mytable_key    serial primary key,
    moobars        VARCHAR(40) not null,
    foobars        DATE
);

SQL Auto Increment Primary Key - PostgreSQL

-- SERIAL keyword auto increments the value
CREATE TABLE Colleges (
  college_id INT SERIAL,
  college_code VARCHAR(20) NOT NULL,
  college_name VARCHAR(50),
  CONSTRAINT CollegePK PRIMARY KEY (college_id)
);

-- inserting record without college_id
INSERT INTO Colleges(college_code, college_name)
VALUES ("ARD13", "Star Public School");

auto increment in postgresql

ALTER TABLE temp ALTER COLUMN id
  ADD GENERATED BY DEFAULT AS IDENTITY

start auto increment from 1 postgres

TRUNCATE TABLE someTable RESTART IDENTITY;

auto increment psql not primary key

CREATE SEQUENCE cateogry_id_seq;
ALTER TABLE category ALTER COLUMN category_id SET DEFAULT nextval('cateogry_id_seq');

primary key auto increment in postgresql

By simply setting our id column as SERIAL with PRIMARY KEY attached, Postgres will handle all the complicated behind-the-scenes work and automatically increment our id column with a unique, primary key value for every INSERT .

sql - PostgreSQL - create an auto-increment column for non-primary key

CREATE SEQUENCE mytable_item_id_seq OWNED BY mytable. item_id;
ALTER TABLE mytable ALTER item_id SET DEFAULT nextval('mytable_item_id_seq');