What is the difference between `->>` and `->` in Postgres SQL?

Question

What is the difference between ->> and -> in SQL?

In this thread (Check if field exists in json type column postgresql), the answe

Answer 1

PostgreSQL provides two native operators -> and ->> to help you query JSON data.

The operator -> returns JSON object field as JSON. The operator ->> returns JSON object field as text.

The following query uses operator -> to get all customers in form of JSON:

SELECT
 info -> 'customer' AS customer
FROM
 orders;

customer
--------
"John Doe"
"Lily Bush"
"Josh William"
"Mary Clark"

And the following query uses operator ->> to get all customers in form of text:

SELECT
 info ->> 'customer' AS customer
FROM
 orders;

customer
--------
John Doe
Lily Bush
Josh William
Mary Clark

You can see more details in the link below http://www.postgresqltutorial.com/postgresql-json/