SQL3

ConsecutiveNumbers.sql

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+
+
+SELECT DISTINCT l1.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

DynamicPivotingofTable.sql

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+SELECT product_id, 
+( IF(store   )

NumberOfPassengersBus.sql

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+with CTE_table (
+    SELECT p.passenger_id,p.arrival_time, min(b.arrival_time) 
+    FROM passenger p
+    JOIN bus b 
+    ON p.arrival_time <= b.arrival_time
+    GROUP BY p.passenger_id
+)
+
+
+SELECT b.bus_id, COUNT(c.btime) AS 'passenger_cnt' 
+FROM bus b
+LEFT JOIN CTE_table c on  b.arrival_time = c.btime 
+GROUP BY b.bus_id
+ORDER  BY b.bus_id

UserActivity.sql

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+# Write your MySQL query statement below
+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  ;