SQL Interview Problem - Solution - (Part - XX) |

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Table Create and insert statements:
-------------------------------------------------------
create table numbers (
id int primary key,
num int
)
insert into numbers values (1, 3),(2, 8),(3, 2),
(4, 10),(5, 14),(6, 3),(7, 20),(8, 15),(9, 4),(10, 8),
(11, 6),(12, 3),(13, 10),(14, 22),(15, 3),(16, 8)

[@sabesanj5509]

WITH cte AS (
SELECT num,
ROW_NUMBER() OVER (ORDER BY num) AS row_num
COUNT(*) OVER() AS total_count
FROM numbers
),
mean_cal AS (
SELECT avg(num) AS mean
FROM numbers
)
mode_cal AS (
SELECT num AS mode
FROM numbers
GROUP BY num
ORDER BY count(*) DESC
LIMIT 1
)
SELECT
(SELECT mean FROM mean_cal) AS mean,
(SELECT mode FROM mode_cal) AS mode,
AVG(num) AS median
FROM cte
WHERE row_num IN ((total_count + 1) / 2, (total_count + 2) / 2);