From e2f5bab8c82a5a2b9c6e32d21a3be9f42a353684 Mon Sep 17 00:00:00 2001
From: Hinduja Cheela <hindujacheela@Mac.attlocal.net>
Date: Wed, 4 Jun 2025 18:25:52 -0500
Subject: [PATCH] Added five solutions

---
 problem1.sql | 10 ++++++++++
 problem2.sql |  2 ++
 problem3.sql | 10 ++++++++++
 problem4.sql |  4 ++++
 problem5.sql | 12 ++++++++++++
 5 files changed, 38 insertions(+)
 create mode 100644 problem1.sql
 create mode 100644 problem2.sql
 create mode 100644 problem3.sql
 create mode 100644 problem4.sql
 create mode 100644 problem5.sql

diff --git a/problem1.sql b/problem1.sql
new file mode 100644
index 0000000..a46f852
--- /dev/null
+++ b/problem1.sql
@@ -0,0 +1,10 @@
+-- # Write your MySQL query statement below
+with cte as(
+select player_id,
+device_id,
+rank()over(partition by player_id order by event_date) as 'rnk'
+from activity)
+
+select player_id,device_id
+from cte
+where rnk=1;
\ No newline at end of file
diff --git a/problem2.sql b/problem2.sql
new file mode 100644
index 0000000..e460df8
--- /dev/null
+++ b/problem2.sql
@@ -0,0 +1,2 @@
+select player_id,event_date,sum(games_played) over(partition by player_id order by event_date) as games_played_so_far
+from activity;
\ No newline at end of file
diff --git a/problem3.sql b/problem3.sql
new file mode 100644
index 0000000..0e8a5b3
--- /dev/null
+++ b/problem3.sql
@@ -0,0 +1,10 @@
+
+with cte as(
+select *, row_number()over()as row_num
+from Point2D)
+
+select round(min(sqrt(pow((c.x-p.x),2)+pow((c.y-p.y),2))),2) as shortest
+from cte c
+inner join cte p
+on c.row_num<p.row_num;
+
diff --git a/problem4.sql b/problem4.sql
new file mode 100644
index 0000000..fbaa684
--- /dev/null
+++ b/problem4.sql
@@ -0,0 +1,4 @@
+# Write your MySQL query statement below
+select p.firstname,p.lastname,a.city,a.state
+from person p
+left join address a on p.personID=a.personID;
\ No newline at end of file
diff --git a/problem5.sql b/problem5.sql
new file mode 100644
index 0000000..a4b0dbc
--- /dev/null
+++ b/problem5.sql
@@ -0,0 +1,12 @@
+
+with cte as(
+select customer_id,year(order_date) as order_date,sum(price) as price
+from orders
+group by customer_id,year(order_date)
+)
+
+select  distinct c1.customer_id
+from cte c1
+left join cte c2 on c1.customer_id=c2.customer_id and c1.order_date+1=c2.order_date and c1.price<c2.price
+group by c1.customer_id
+having count(*)-count(c2.customer_id)=1
\ No newline at end of file