Querying the dimensional model
Here it is! The schema reorganized using the dimensional model:
Let's try to run a query based on this schema. How about we try to find the number of minutes we ran in July, 2019?
We'll break this up in two steps. First, we'll get the total number of minutes recorded in the database. Second, we'll narrow down that query to week_id's from July, 2019.
Deze oefening maakt deel uit van de cursus
Database Design
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
SELECT
-- Select the sum of the duration of all runs
___
FROM
___;