From 122d29163baf04cd5a144e4b25e0f15681069aa9 Mon Sep 17 00:00:00 2001 From: akanksha-vishwak Date: Wed, 4 Jun 2025 01:55:07 -0400 Subject: [PATCH 1/2] solution to both problems --- 01-TopTravellers.sql | 6 ++++++ 02-ApplesAndOranges.sql | 29 +++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) create mode 100644 01-TopTravellers.sql create mode 100644 02-ApplesAndOranges.sql diff --git a/01-TopTravellers.sql b/01-TopTravellers.sql new file mode 100644 index 0000000..f628f36 --- /dev/null +++ b/01-TopTravellers.sql @@ -0,0 +1,6 @@ +-- Problem 1: Top Travellers (https://leetcode.com/problems/top-travellers/) +select 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 asc \ No newline at end of file diff --git a/02-ApplesAndOranges.sql b/02-ApplesAndOranges.sql new file mode 100644 index 0000000..8f3a6a8 --- /dev/null +++ b/02-ApplesAndOranges.sql @@ -0,0 +1,29 @@ + + +-- cte +with apples as( + select sale_date, fruit as apple, sold_num as a_num + from sales where fruit = 'apples' +), +oranges as ( + select sale_date, fruit as oranges, sold_num as o_num + from sales where fruit = 'oranges' +) +select apples.sale_date, (a_num - o_num) as diff +from apples +join oranges on apples.sale_date=oranges.sale_date +order by sale_date + +-- solution 2 +select a.sale_date, a.sold_num - b.sold_num as diff +from sales a +join sales b on a.sale_date = b.sale_date +where a.fruit = 'apples' and b.fruit = 'oranges' + +-- better version +select sale_date, +sum (case when fruit='apples' then sold_num else 0 end) - +sum (case when fruit='oranges' then sold_num else 0 end) as diff +from sales +group by sale_date +order by sale_date From 0aad5c792a230903a3cb6a89aa580c47b48d6d22 Mon Sep 17 00:00:00 2001 From: akanksha-vishwak Date: Wed, 4 Jun 2025 01:57:31 -0400 Subject: [PATCH 2/2] space issue --- 02-ApplesAndOranges.sql | 2 -- 1 file changed, 2 deletions(-) diff --git a/02-ApplesAndOranges.sql b/02-ApplesAndOranges.sql index 8f3a6a8..6604d4e 100644 --- a/02-ApplesAndOranges.sql +++ b/02-ApplesAndOranges.sql @@ -1,5 +1,3 @@ - - -- cte with apples as( select sale_date, fruit as apple, sold_num as a_num