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 # Mock_SQL
+1 Problem 1 : Top Travellers (https://leetcode.com/problems/top-travellers/)
 
-Please submit the interview problems posted in slack channel here. The problems and statements are intentionally not shown here so that students are not able to see them in advance 
+Solution:
+Select U.name, ifnull(sum(R.distance),0)  as travelled_distance 
+from Users U
+left join Rides R
+on U.id = R.user_id  
+group by U.id
+order by travelled_distance desc, name     
+
+1 Problem 1 : Apples & Oranges (https://leetcode.com/problems/apples-oranges/)
+
+Solution:
+Select a.sale_date, sum(a.sold_num - b.sold_num) as diff
+from Sales a
+join Sales b
+on a.sale_date = b.sale_date
+where a.fruit in ('apples') and b.fruit in ('oranges') 
+group by a.sale_date
+order by a.sale_date
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