Cleaning up results
Returning to the breakdown of Scandinavian awards you previously made, you want to clean up the results by replacing the nulls with meaningful text.
Latihan ini adalah bagian dari kursus
PostgreSQL Summary Stats and Window Functions
Petunjuk latihan
- Turn the
nulls in theCountrycolumn toAll countries, and thenulls in theGendercolumn toAll genders.
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
SELECT
-- Replace the nulls in the columns with meaningful text
___(Country, ___) AS Country,
___(Gender, ___) AS Gender,
COUNT(*) AS Awards
FROM Summer_Medals
WHERE
Year = 2004
AND Medal = 'Gold'
AND Country IN ('DEN', 'NOR', 'SWE')
GROUP BY ROLLUP(Country, Gender)
ORDER BY Country ASC, Gender ASC;