From ff60aa7938ccbb71d54c428b6de653ba32cbff2a Mon Sep 17 00:00:00 2001
From: medilin <medilinnjoki@icloud.com>
Date: Sat, 16 Aug 2025 20:44:31 +0200
Subject: [PATCH 1/3] solved lab

---
 .gitignore     |  2 ++
 challenges.sql | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 challenges.sql

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f259787
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+sakila-data.sql
+sakila-schema.sql
diff --git a/challenges.sql b/challenges.sql
new file mode 100644
index 0000000..ae7ef22
--- /dev/null
+++ b/challenges.sql
@@ -0,0 +1,60 @@
+USE sakila;
+
+SELECT 
+    max(LENGTH) as max_duration,
+    min(LENGTH) as min_duration
+FROM film;
+
+select 
+    FLOOR(AVG(LENGTH)/60) as average_duration_hour,
+    FLOOR(AVG(LENGTH)%60) as average_duration_min
+from FILM;
+
+select
+    DATEDIFF(max(rental_date), min(rental_date)) as days_of_operation
+from rental;
+
+select *,
+    MONTHNAME(rental_date) as month_name,
+    DAYNAME(rental_date) as day_name,
+    CASE 
+        WHEN WEEKDAY(rental_date) in (5, 6) 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, ', ', SUBSTR(email, 1, 3))
+from customer
+ORDER BY last_name ASC;
+
+-- The total number of films that have been released
+select count(*) as total_films from film;
+
+-- The number of films for each rating, sorting the results in descending order of the number of films
+select rating, count(*) from film
+group by rating
+order by count(*) desc;
+
+--  The mean film duration for each rating, and sort the results in descending order of the mean duration
+select rating, ROUND(AVG(LENGTH), 2) as mean_film_duration from film
+group by rating
+order by AVG(LENGTH) desc;
+
+-- Identify which ratings have a mean duration of over two hours
+select rating, ROUND(AVG(LENGTH), 2) as mean_film_duration from film
+group by rating
+HAVING AVG(LENGTH) >= 120
+order by AVG(LENGTH) desc;
+
+SELECT last_name, count(*)
+FROM actor
+GROUP BY last_name
+HAVING COUNT(*) = 1;
\ No newline at end of file

From 49d6a6e5ee406f25566b8c9c7f6933f7c3d2459e Mon Sep 17 00:00:00 2001
From: medilin <medilinnjoki@icloud.com>
Date: Sat, 16 Aug 2025 20:53:24 +0200
Subject: [PATCH 2/3] split the first request

---
 challenges.sql | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/challenges.sql b/challenges.sql
index ae7ef22..f225de9 100644
--- a/challenges.sql
+++ b/challenges.sql
@@ -1,7 +1,10 @@
 USE sakila;
 
 SELECT 
-    max(LENGTH) as max_duration,
+    max(LENGTH) as max_duration
+FROM film;
+
+SELECT
     min(LENGTH) as min_duration
 FROM film;
 

From bfbd2c06f5e48459e929450f502b52e91469b5f9 Mon Sep 17 00:00:00 2001
From: medilin <medilinnjoki@icloud.com>
Date: Sat, 16 Aug 2025 21:07:16 +0200
Subject: [PATCH 3/3] combined the firtst request

---
 challenges.sql | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/challenges.sql b/challenges.sql
index f225de9..778f07a 100644
--- a/challenges.sql
+++ b/challenges.sql
@@ -1,11 +1,7 @@
 USE sakila;
 
 SELECT 
-    max(LENGTH) as max_duration
-FROM film;
-
-SELECT
-    min(LENGTH) as min_duration
+    max(LENGTH) as max_duration, min(LENGTH) as min_duration
 FROM film;
 
 select