Missing sequence where gap is 1

• PSB

  SSChampion

  Points: 13195

  More actions

  June 6, 2013 at 1:51 pm

  #294291

  create table #MyTable (RecID INT IDENTITY(1,1),trxnNum int,Site varchar(10),Company VARCHAR(100))

  INSERT INTO #MyTable (trxnNum,Site,Company)

  SELECT 14418,'MySite','MyCompany'

  UNION ALL

  SELECT 14420,'MySite','MyCompany'

  UNION ALL

  SELECT 14431,'MySite','MyCompany'

  UNION ALL

  SELECT 14432,'MySite','MyCompany'

  UNION ALL

  SELECT 14436,'MySite','MyCompany'

  select * from #MyTable

  DROP TABLE #MyTable

  I have to return rows where TrxnNum = 14418 and 14420 because the gap is only 1 . If the gap is > than 1 example 14432 and 14436, I dont want to return those. If there is no gap as well 14431 and 14432 I dont want to return as well.

  In short where gap is = 1.

  Thanks,

• Sean Lange

  SSC Guru

  Points: 286590

  More actions

  June 6, 2013 at 2:13 pm

  #1621900

  I think you should be able to tweak the logic in this article to achieve what you are looking for.

  http://www.sqlservercentral.com/articles/SQL+Puzzles/findinggapsinasequentialnumbersequence/2336/[/url]

  Here is another article covering this topic.

  http://www.sqlservercentral.com/articles/Advanced+Querying/anefficientsetbasedsolutionforislandsandgaps/1619/[/url]

  _______________________________________________________________

  Need help? Help us help you.

  Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

  Need to split a string? Try Jeff Modens splitter http://www.sqlservercentral.com/articles/Tally+Table/72993/.

  Cross Tabs and Pivots, Part 1 – Converting Rows to Columns - http://www.sqlservercentral.com/articles/T-SQL/63681/
  Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs - http://www.sqlservercentral.com/articles/Crosstab/65048/
  Understanding and Using APPLY (Part 1) - http://www.sqlservercentral.com/articles/APPLY/69953/
  Understanding and Using APPLY (Part 2) - http://www.sqlservercentral.com/articles/APPLY/69954/