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.
Latihan ini adalah bagian dari kursus
Database Design
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
SELECT
-- Select the sum of the duration of all runs
___
FROM
___;