Finding the table type
Throughout this course, you have been working with data about Olympic athletes, countries' climate, and countries' demographics. You may have wondered if these data sources were actually tables or instead views. Knowing this information could help you decide how to structure your queries and understand why a query may be slow (e.g. it uses a view).
In this chapter, you will work with air quality data. One of the main data sources is annual_aqi. Determine if it really is a table.
Cet exercice fait partie du cours
Improving Query Performance in PostgreSQL
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
SELECT DISTINCT ___
FROM information_schema.___
WHERE table_catalog = 'olympics_aqi';