Homework

README.md

@@ -78,7 +78,7 @@ Imagine you work at a movie rental company as an analyst. By using SQL in the ch
 
 ## Challenge 2
 
-1. Next, you need to analyze the films in the collection to gain some more insights. Using the `film` table, determine:
+1. Next, you need to analyze the films in the collection to gain so me more insights. Using the `film` table, determine:
 	- 1.1 The **total number of films** that have been released.
 	- 1.2 The **number of films for each rating**.
 	- 1.3 The **number of films for each rating, sorting** the results in descending order of the number of films.

SQL-Data-Aggregation-and-Transformation.sql

@@ -0,0 +1,92 @@
+USE sakila;
+
+-- Challenge 1
+
+-- 1.1
+SELECT 
+	MIN(length) AS min_duration,
+    MAX(length) AS max_duration
+FROM film;
+
+-- 1.2
+SELECT
+	FLOOR(AVG(length) / 60) AS avg_hours,
+    FLOOR(AVG(length)% 60 ) AS avg_minutes
+FROM film;
+
+-- 2.1 
+SELECT
+	DATEDIFF(MAX(rental_date), MIN(rental_date)) AS days_operating
+FROM rental;
+
+
+-- 2.2
+Select
+	rental_id,
+    rental_date,
+    MONTHNAME(rental_date) AS rental_mounth,
+    DAYNAME(rental_date) AS  rental_weekday
+FROM rental
+LIMIT 20;
+
+-- 2.3
+SELECT
+	rental_id,
+    rental_date,
+    DAYNAME(rental_date),
+
+    CASE
+		WHEN DAYNAME(rental_date) IN ('Saturdat', 'Sunday') THEN 'Weekend'
+        ELSE 'Workday'
+	END AS day_type
+FROM rental
+LIMIT 20;
+
+-- 3
+SELECT
+	title,
+    IFNULL(rental_duration, 'NOT AVAILABLE') as rental_duration
+FROM film
+ORDER BY title ASC;     
+
+
+-- Challenge 2 
+
+-- 1.1
+SELECT COUNT(*) AS total_films
+FROM film;
+
+-- 1.2
+SELECT rating, COUNT(*) AS film_count
+FROM film
+GROUP BY rating;
+
+-- 1.3
+SELECT rating, COUNT(*) AS film_count
+FROM film
+GROUP BY rating
+ORDER BY film_count DESC;
+
+-- 2.1
+SELECT
+	rating,
+    ROUND(AVG(length), 2) AS avg_duration
+FROM film
+GROUP BY rating
+ORDER BY avg_duration DESC;
+
+-- 2.2
+SELECT
+	rating,
+    ROUND(AVG(length),2) AS avg_duration
+FROM film
+GROUP BY rating
+HAVING avg_duration > 120;
+
+
+
+
+
+
+
+