From 6a4e08c15d852123469fb6bb6375cbc4a017ed54 Mon Sep 17 00:00:00 2001
From: Aniruddh <amalankia@mail.sfsu.edu>
Date: Thu, 12 Jun 2025 16:11:01 -0700
Subject: [PATCH] Completed Sql3

---
 ConsecutiveNumbers.sql |  8 ++++++++
 Numberofpassengers.sql | 10 ++++++++++
 PivotProducts.sql      | 17 +++++++++++++++++
 useractivity.sql       |  9 +++++++++
 4 files changed, 44 insertions(+)
 create mode 100644 ConsecutiveNumbers.sql
 create mode 100644 Numberofpassengers.sql
 create mode 100644 PivotProducts.sql
 create mode 100644 useractivity.sql

diff --git a/ConsecutiveNumbers.sql b/ConsecutiveNumbers.sql
new file mode 100644
index 0000000..fdee69f
--- /dev/null
+++ b/ConsecutiveNumbers.sql
@@ -0,0 +1,8 @@
+# Write your MySQL query statement below
+SELECT DISTINCT l3.num AS 'ConsecutiveNums' FROM logs l1, logs l2, logs l3 WHERE
+l1.id = l2.id -1
+AND
+l2.id = l3.id-1
+AND l1.num =l2.num
+AND
+l2.num = l3.num;
\ No newline at end of file
diff --git a/Numberofpassengers.sql b/Numberofpassengers.sql
new file mode 100644
index 0000000..f5ac83c
--- /dev/null
+++ b/Numberofpassengers.sql
@@ -0,0 +1,10 @@
+SELECT
+    bus_id,
+    count(passenger_id) - lag(count(passenger_id), 1, 0) OVER (
+        ORDER BY b.arrival_time
+    ) AS passengers_cnt
+FROM
+    Buses AS b
+    LEFT JOIN Passengers AS p ON p.arrival_time <= b.arrival_time
+GROUP BY 1
+ORDER BY 1;
\ No newline at end of file
diff --git a/PivotProducts.sql b/PivotProducts.sql
new file mode 100644
index 0000000..63cbfff
--- /dev/null
+++ b/PivotProducts.sql
@@ -0,0 +1,17 @@
+REATE PROCEDURE PivotProducts()
+BEGIN
+	# Write your MySQL query statement below.
+	SET group_concat_max_len = 5000;
+    SELECT GROUP_CONCAT(DISTINCT 'MAX(CASE WHEN store = \'',
+               store, 
+               '\' THEN price ELSE NULL END) AS ', 
+               store 
+               ORDER BY store) INTO @sql
+    FROM Products;
+    SET @sql =  CONCAT('SELECT product_id, ',
+                    @sql,
+                    ' FROM Products GROUP BY product_id');
+    PREPARE stmt FROM @sql;
+    EXECUTE stmt;
+    DEALLOCATE PREPARE stmt;
+END
\ No newline at end of file
diff --git a/useractivity.sql b/useractivity.sql
new file mode 100644
index 0000000..357fbcf
--- /dev/null
+++ b/useractivity.sql
@@ -0,0 +1,9 @@
+SELECT 
+    activity_date AS day,
+    COUNT(DISTINCT user_id) AS active_users
+FROM 
+    Activity
+WHERE 
+    activity_date BETWEEN '2019-06-28' AND '2019-07-27'
+GROUP BY 
+    activity_date