SQL Puzzle | Repeat the Number Number Times Puzzle

In this puzzle you have to repeat the number number times.

Please check the sample input and the expected output.

Sample Input

Expected Output

Use below script to create table and insert sample data into it.

--

CREATE TABLE GenerateNumbersByNumber
(
	NUM INT
)
GO

INSERT INTO GenerateNumbersByNumber VALUES 
(1),(2),(3)
GO

SELECT * FROM GenerateNumbersByNumber
GO

--

Rules/Restrictions

The solution should be should use “SELECT” statement or “CTE”.

Add your solution(s) in the comments section or send you solution(s) to pawankkmr@gmail.com

SOLUTION – 1

--


;WITH CTE AS
(
	SELECT * FROM GenerateNumbersByNumber
)
SELECT a.NUM Number
FROM CTE a INNER JOIN CTE b ON a.NUM >= b.NUM
ORDER BY Number

--

Output-1

--                            


Number
-----------
1
2
2
3
3
3

(6 rows affected)


--

SOLUTION – 2

--


;WITH CTE AS
(
	SELECT * FROM GenerateNumbersByNumber
)
SELECT a.NUM Number
FROM CTE a 
CROSS APPLY 
( 
	SELECT * FROM CTE b WHERE a.NUM >= b.NUM
)u
ORDER BY Number

--

Output-2

--                            


Number
-----------
1
2
2
3
3
3

(6 rows affected)


--

Add a comment if you have any other or better solution in mind. I would love to learn it. We all need to learn.

Pawan Khowal

Pawan is a SQL Server Developer. If you need any help in writing code/puzzle or training please email at – pawankkmr”AT”gmail.com. Meanwhile please go throgh the top pages from his blog.

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