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4 changes: 4 additions & 0 deletions Top Travellers.sql
Original file line number Diff line number Diff line change
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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
6 changes: 6 additions & 0 deletions applea and oranges .sql
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with cte1 as (select * from sales where fruit = 'apples') ,

cte2 as (select * from sales where fruit= 'oranges')


select distinct cte1.sale_date , ( cte1.sold_num -cte2.sold_num) as 'diff' from cte1 left join cte2 on cte1.sale_date =cte2.sale_date