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

Input Data:

Number
-----------
1
5
10
16
20

Expected Output:

Median
-----------
10

Create a sample table:

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

Solution 1:

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:

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

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