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Home 2018 May SQL Puzzle: Find the Median Value from the Given Number

SQL Puzzle: Find the Median Value from the Given Number

This article is half-done without your Comment! *** Please share your thoughts via Comment ***

Check the below input data and expected output and find the median value from the given range of Numbers.

Input Data:

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2
3
4
5
6
7
Number
-----------
1
5
10
16
20

Expected Output:

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2
3
Median
-----------
10

Create a sample table:

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2
3
CREATE TABLE tbl_TestMedian (Number INT)
INSERT INTO tbl_TestMedian VALUES (1),(5),(10),(16),(20)
Go

Solution 1:

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SELECT
(
(SELECT MAX(Number) FROM
(SELECT TOP 50 PERCENT Number FROM tbl_TestMedian ORDER BY Number) AS LastSet)
+
(SELECT MIN(Number) FROM
(SELECT TOP 50 PERCENT Number FROM tbl_TestMedian ORDER BY Number DESC) AS FirstSet)
) / 2 AS Median

Solution 2:

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SELECT MAX(Number) AS Median
FROM
(
SELECT Number, NTILE(4) OVER (ORDER BY Number) AS MiddleRange
FROM tbl_TestMedian
) T
WHERE MiddleRange = 2

Please try the different solution for this puzzle and share it via comment...

May 9, 2018Anvesh Patel
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Comments: 3
  1. Marcel Hofman
    March 22, 2019 at 2:25 pm

    –using @@rowcount

    DECLARE @rowcount INT
    SET @rowcount = @@ROWCOUNT
    ; WITH CTE AS
    (
    SELECT *, ROW_NUMBER () OVER (ORDER BY number) n FROM tbl_testmedian
    )
    SELECT * FROM CTE WHERE n = (@rowcount + 1) / 2

    ReplyCancel
  2. Dpan
    April 15, 2019 at 9:12 am

    declare @count int
    select @count=count(*)/2 from #tbl_TestMedian
    ;WITH Ordered AS (
    select ROW_NUMBER() Over (Order By Number) as rno,NUmber from #tbl_TestMedian
    )
    select * from Ordered where rno=@count

    ReplyCancel
  3. koustav modak
    October 30, 2019 at 1:57 pm

    select Number from
    (select row_number() over() as t,
    * from tbl_TestMedian )T1
    where t =(

    select (count(1)+1)/2 from tbl_TestMedian )

    ReplyCancel

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Anvesh Patel
Anvesh Patel

Database Engineer

May 9, 2018 3 Comments SQL PuzzleAnvesh Patel, database, database research and development, dbrnd, Median Value, SQL Advance Query, SQL Interview, SQL Problem, SQL Programming, SQL Puzzle, SQL Query, SQL Tips and Tricks
About Me!

I'm Anvesh Patel, a Database Engineer certified by Oracle and IBM. I'm working as a Database Architect, Database Optimizer, Database Administrator, Database Developer. Providing the best articles and solutions for different problems in the best manner through my blogs is my passion. I have more than six years of experience with various RDBMS products like MSSQL Server, PostgreSQL, MySQL, Greenplum and currently learning and doing research on BIGData and NoSQL technology. -- Hyderabad, India.

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