SQL Puzzle | DISTINCT + Can you ORDER BY this data? | SQL Interview Question

In this puzzle we have to make the distinct data ( DISTINCT from COLUMN [Name] AND Id ) and provide output in the required format using ORDER BY

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 testOrderBY1
(
	 [Name] VARCHAR(1)
	,Id INT
)
GO

INSERT INTO testOrderBY1 VALUES
 ('X', 1),('X', 1),('X', 9),('X', 10),('X', 1)
,('A', 4),('A', 2),('A', 4),('A', 6)
,('U', 4),('U', 12),('U', 9)
,('B', 5),('B', 5),('B', 6),('B', 6),('B', 7),('B', 7),('B', 8)
GO

SELECT * FROM testOrderBY1
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 | Using ORDER BY … OVER (PARTITION BY ..) Clause

--


SELECT
    *
FROM
    testOrderBY1
GROUP BY [Name] , Id 
ORDER BY MIN(Id) OVER (PARTITION BY [Name]), Id

--

Output-1

--                            


Name Id
---- -----------
X    1
X    9
X    10
A    2
A    4
A    6
U    4
U    9
U    12
B    5
B    6
B    7
B    8

(13 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.

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Pawan Khowal

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