From 4d93878aa7bfc222f35072908fe892bdef106ec6 Mon Sep 17 00:00:00 2001
From: Sakshi Asati <sakshiasati51@gmail.com>
Date: Sun, 1 Jun 2025 23:49:30 -0600
Subject: [PATCH] Done SQL3

---
 Problem1.sql | 11 +++++++++++
 Problem2.sql | 12 ++++++++++++
 Problem3.sql |  2 ++
 3 files changed, 25 insertions(+)
 create mode 100644 Problem1.sql
 create mode 100644 Problem2.sql
 create mode 100644 Problem3.sql

diff --git a/Problem1.sql b/Problem1.sql
new file mode 100644
index 0000000..823975d
--- /dev/null
+++ b/Problem1.sql
@@ -0,0 +1,11 @@
+with cte as (
+
+   select num,
+
+   lead(num,1) over() num1,
+   lead(num,2) over() num2
+   from logs
+
+)
+
+select distinct num ConsecutiveNums from cte where (num=num1) and (num=num2)
\ No newline at end of file
diff --git a/Problem2.sql b/Problem2.sql
new file mode 100644
index 0000000..db40a68
--- /dev/null
+++ b/Problem2.sql
@@ -0,0 +1,12 @@
+WITH CTE AS (
+    SELECT p.passenger_id, MIN(b.arrival_time) AS btime
+    FROM passengers p
+    JOIN buses b ON p.arrival_time <= b.arrival_time
+    GROUP BY p.passenger_id
+)
+
+SELECT b.bus_id, COUNT(c.btime) AS 'passengers_cnt'
+FROM buses b
+LEFT JOIN CTE c ON b.arrival_time = c.btime
+GROUP BY b.bus_id
+ORDER BY b.bus_id;
\ No newline at end of file
diff --git a/Problem3.sql b/Problem3.sql
new file mode 100644
index 0000000..8aca0f9
--- /dev/null
+++ b/Problem3.sql
@@ -0,0 +1,2 @@
+select activity_date as 'day' , COUNT(DISTINCT user_id) AS 'active_users' from Activity
+WHERE activity_date >'2019-06-27' AND activity_date <='2019-07-27' Group by activity_date;