This repository was archived by the owner on Sep 8, 2025. It is now read-only.

Commit 23d19f3

authored

customers-who-never-order.

1 parent c65e2a2 commit 23d19f3Copy full SHA for 23d19f3

File tree

-2

lines changed

-2

lines changed

Lines changed: 8 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,13 @@`
`1`	`1`	`# Time: O(n^2)`
`2`	`2`	`# Space: O(1)`
`3`	`3`
`4`		`-SELECT Name AS Customers FROM Customers WHERE Id NOT IN (SELECT CustomerId FROM Orders)`
	`4`	`+SELECT Name AS Customers`
	`5`	`+FROM Customers`
	`6`	`+WHERE Id NOT IN (SELECT CustomerId FROM Orders)`
`5`	`7`
`6`		`-SELECT Customers.Name AS Customers FROM (Customers LEFT JOIN Orders ON Customers.Id = Orders.CustomerId) WHERE Orders.CustomerId IS NULL`
	`8`	`+ /** solution two */`
	`9`	`+`
	`10`	`+SELECT Customers.Name AS Customers`
	`11`	`+FROM (Customers LEFT JOIN Orders ON Customers.Id = Orders.CustomerId)`
	`12`	`+WHERE Orders.CustomerId IS NULL`
`7`	`13`

Comments

(0)