Median Order Value per Category (No MEDIAN)

SQL practice question · Hard · Subqueries & CTEs · Flipkart, Amazon

Compute the median `order_value` per category WITHOUT using a MEDIAN or PERCENTILE function. Ignore NULL order values (a category whose values are all NULL does not appear). For an even number of values the median is the average of the two middle values. Return `category`, `median_value` (ROUND 2). Order by `category`.

Table: cat_orders

Schema of cat_orders
Column	Type
order_id	INTEGER
category	TEXT
order_value	REAL

Schema of cat_orders

Column

Type

order_id

INTEGER

Sample rows of cat_orders
order_id	category	order_value
1	Mobiles	100
2	Mobiles	300
3	Mobiles	200
4	Fashion	50
5	Fashion	90
6	Fashion	70
7	Fashion	110
8	Books	15

Expected output on the sample data
category	median_value
Books	15
Fashion	80
Mobiles	200

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