create table with primary key and foreign key n postgres code example

Example 1: create table postgresql foreign key

CREATE TABLE so_items (
	so_id INTEGER,
  	...
	FOREIGN KEY (so_id) REFERENCES so_headers (id)
);

Example 2: create table postgresql primary key

CREATE TABLE TABLE (
	column_1 data_type PRIMARY KEY,
	column_2 data_type,
	…
);