diff --git a/SQL Data Aggregation and Transformation.sql b/SQL Data Aggregation and Transformation.sql
new file mode 100644
index 0000000..dde4319
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+++ b/SQL Data Aggregation and Transformation.sql	
@@ -0,0 +1,77 @@
+USE sakila;
+
+SELECT 
+	MAX(length) AS max_duration,
+    MIN(length) AS min_duration
+FROM film;
+
+SELECT 
+	FLOOR(AVG(length) / 60) AS avg_hours,
+    ROUND(AVG(length) / 60) AS avg_minutes
+FROM film;
+
+SELECT 
+	DATEDIFF(MAX(rental_date), MIN(rental_date)) AS days_operating
+FROM rental;
+
+SELECT 
+	rental_id,
+    rental_date,
+    MONTHNAME(rental_date) AS rental_month,
+    DAYNAME(rental_date) AS rental_weekday
+FROM rental
+LIMIT 20;
+
+SELECT 
+	rental_id,
+    rental_date,
+    DAYNAME(rental_date) AS rental_weekday,
+    CASE
+		WHEN DAYOFWEEK(rental_date) IN (1, 7) THEN 'weekend'
+        ELSE 'workday'
+	END AS day_type
+FROM rental
+LIMIT 20;
+
+SELECT 
+	title,
+    IFNULL(rental_duration, 'Not available') AS rental_duration
+FROM film
+ORDER BY title ASC;
+
+SELECT 
+	CONCAT(first_name, ' ', last_name) AS full_name,
+    SUBSTRING(email, 1, 3) AS email_prefix
+FROM customer
+ORDER BY last_name ASC;
+
+SELECT COUNT(*) AS total_films
+FROM film;
+
+SELECT rating, COUNT(*) AS num_films
+FROM film
+GROUP BY rating;
+
+SELECT rating, COUNT(*) AS num_films
+FROM film
+GROUP BY rating
+ORDER BY num_films DESC;
+
+SELECT 
+	rating,
+    ROUND(AVG(length), 2) AS avg_duration
+FROM film
+GROUP BY rating
+ORDER BY avg_duration DESC;
+
+SELECT 
+	rating,
+    ROUND(AVG(length), 2) AS avg_duration
+FROM film
+GROUP BY rating
+HAVING AVG(length) > 120;
+
+SELECT last_name
+FROM actor
+GROUP BY last_name
+HAVING COUNT(*) = 1;
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