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consecutive-numbers.sql

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Lines changed: 8 additions & 12 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,17 +1,13 @@`
	`1`	`+/*`
`1`	`2`	`# Time: O(n)`
`2`	`3`	`# Space: O(n)`
	`4`	`+*/`
`3`	`5`
`4`		`-SELECT DISTINCT(Num) AS ConsecutiveNums`
`5`		`-FROM (`
`6`		`- SELECT`
`7`		`- Num,`
`8`		`- @counter := IF(@prev = Num, @counter + 1, 1) AS how_many_cnt_in_a_row,`
`9`		`- @prev := Num`
`10`		`- FROM Logs y, (SELECT @counter:=1, @prev:=NULL) vars`
`11`		`-) sq`
`12`		`-WHERE how_many_cnt_in_a_row >= 3`
	`6`	`+/ this is a ms sql script /`
`13`	`7`
`14`		`-SELECT DISTINCT l1.Num as ConsecutiveNums`
`15`		`-FROM Logs l1, Logs l2, Logs l3`
`16`		`-WHERE l1.Id + 1 = l2.Id AND l2.Id + 1 = l3.Id AND l1.Num = l2.Num AND l2.Num = l3.Num`
	`8`	`+/* Write your T-SQL query statement below */`
`17`	`9`
	`10`	`+/* Write your T-SQL query statement below */`
	`11`	`+SELECT DISTINCT l1.num AS ConsecutiveNums`
	`12`	`+FROM Logs l1, Logs l2, Logs l3`
	`13`	`+WHERE l1.id = l2.id - 1 AND l2.id = l3.id - 1 AND l1.num = l2.num AND l2.num = l3.num;`

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