The PostgreSQL provides Universally Unique Identifier -UUID data type and related functions.

In the previous post, I shared the truth about Universally Unique Identifier - UUID.
You can visit this article here.

PostgreSQL provides two extensions.

1. uuid-ossp
2. pgcrypto.

You can install above extension using below script.

CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
CREATE EXTENSION IF NOT EXISTS pgcrypto;

I am using pgcrypto extension for generating an UUID.

Below is a small demonstration:

Generate UUID using gen_random_uuid():

SELECT gen_random_uuid();

Create a sample table with UUID Data type:

CREATE TABLE tbl_UUIDSample
(  
   MyUUID UUID PRIMARY KEY DEFAULT gen_random_uuid()
   ,Name TEXT   
);

Insert sample data:

INSERT INTO tbl_UUIDSample (Name)
VALUES
('Anvesh'),('Martin')
,('Roy'),('Jenny')
,('Ronic'),('Monika');

The Result:

SELECT *FROM tbl_UUIDSample;