diff --git a/Combine Two Tables.sql b/Combine Two Tables.sql
new file mode 100644
index 0000000..adbd739
--- /dev/null
+++ b/Combine Two Tables.sql	
@@ -0,0 +1 @@
+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/Customers with Strictly Increasing Purchases.sql b/Customers with Strictly Increasing Purchases.sql
new file mode 100644
index 0000000..86df84e
--- /dev/null
+++ b/Customers with Strictly Increasing Purchases.sql	
@@ -0,0 +1,8 @@
+WITH CTE AS(
+SELECT customer_id , YEAR(order_date) as 'year', SUM(price) as 'price' from orders GROUP BY year , customer_id 
+order by customer_id , year
+)
+
+SELECT c1.customer_id   from CTE c1 LEFT JOIN CTE c2 ON c1.customer_id = c2.customer_id 
+AND c1.year + 1 = c2.year AND c1.price < c2.price GROUP BY c1.customer_id 
+HAVING COUNT(*) - COUNT(c2.customer_id) = 1;
\ No newline at end of file
diff --git a/Game Play Analysis II.sql b/Game Play Analysis II.sql
new file mode 100644
index 0000000..7184a45
--- /dev/null
+++ b/Game Play Analysis II.sql	
@@ -0,0 +1 @@
+SELECT a.player_id, a.device_id FROM Activity a WHERE a.event_date IN (SELECT MIN(b.event_date) FROM Activity b WHERE a.player_id = b.player_id)
\ No newline at end of file
diff --git a/Game Play Analysis III.sql b/Game Play Analysis III.sql
new file mode 100644
index 0000000..d203e16
--- /dev/null
+++ b/Game Play Analysis III.sql	
@@ -0,0 +1 @@
+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/Shortest Distance in a Plane.sql b/Shortest Distance in a Plane.sql
new file mode 100644
index 0000000..18b20da
--- /dev/null
+++ b/Shortest Distance in a Plane.sql	
@@ -0,0 +1 @@
+SELECT ROUND(MIN(SQRT(POW(p2.x - p1.x,2) + POW(p2.y - p1.y, 2))), 2) AS 'shortest' FROM Point2d p1 INNER JOIN Point2d p2 ON p1.x != p2.x OR p1.y != p2.y
\ No newline at end of file