Analyzing Streaming Service Content in SQL
Which family friendly
Percentage of content that is family-oriented by streaming service
Exploring our data
Let's start by checking out the data we will be working with. We can start with the amazon, hulu, netflix, and disney tables.
SELECT *
FROM amazonSELECT *
FROM huluSELECT *
FROM netflixSELECT *
FROM disneyWe can also inspect the genres table, which is different from the other tables.
SELECT *
FROM genresPreparing our data
Joining the different tables
Our data appears to mostly have the same column names. So we can join the data with a series of UNIONs, which will append each table to the previous one.
We use UNION ALL to preserve any possible duplicate rows, as we will want to count entries if they appear in multiple services.
SELECT *
FROM amazon
UNION ALL
SELECT *
FROM hulu
UNION ALL
SELECT *
FROM netflix
UNION ALL
SELECT *
FROM disneyOne problem with the above approach is that we lose out on the streaming service information. So let's repeat our query, but add in the required info!
SELECT *, 'amazon' AS service
FROM amazon
UNION
SELECT *, 'hulu' AS service
FROM hulu
UNION
SELECT *, 'netflix' AS service
FROM netflix
UNION
SELECT *, 'disney' AS service
FROM disneyGreat! But we have one more table that might prove useful. Let's add in the genre information with a join.
To do this, we will need to use a Common Table Expression, or CTE.
WITH service_data AS (
SELECT *, 'amazon' AS service
FROM amazon
UNION
SELECT *, 'hulu' AS service
FROM hulu
UNION
SELECT *, 'netflix' AS service
FROM netflix
UNION
SELECT *, 'disney' AS service
FROM disney
)
SELECT *
FROM service_data AS sd
LEFT JOIN genres AS g
ON sd.title = g.film