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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

NUM
1
2
3

Expected Output

Number
1
2
2
3
3
3

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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