#978

One Leader per Category

Each category card must show exactly one most expensive product. If prices tie, the product with the smaller id wins. Fix the report so it returns category and name, one row per category, sorted by category.

Buggy query
SELECT category, name
FROM (
  SELECT category, name,
         RANK() OVER (PARTITION BY category ORDER BY price DESC) rn
  FROM products
) t
WHERE rn = 1
ORDER BY category, name;

Exempel på förväntad utdata

Så här ser ett korrekt svar ut — radantalet är dess eget, det behöver inte matcha schematabellerna.

namecategory
Lamphome
Mugkitchen
Notebookoffice

Ditt frågeresultat visas här