In this post, I am sharing a demonstration on how to RECURSIVE VIEW in PostgreSQL?

Recursive View is similar to Recursive CTE. Last year, I shared a post on Fibonacci Series where I used Recursive CTE.

Here, I am converting that same Recursive CTE into the Recursive View.

PostgreSQL: Fibonacci Series Function for Database Developer Interview

Please check the below demonstration:

Create a RECURSIVE VIEW for finding the Fibonacci Series:

CREATE RECURSIVE VIEW Fibonacci(Num1,Num2) AS 
(
	VALUES(0,1)
	UNION ALL
        SELECT 
		GREATEST(Num1,Num2),Num1 + Num2 AS FibonacciSeries 
	FROM Fibonacci
        WHERE Num2 < 50
);

SELECT the view data:

select Num1 as FibonacciSeries
from Fibonacci;

The Result:

fibonacciseries
---------------
              0
              1
              1
              2
              3
              5
              8
             13
             21
             34