InstantForum.NET v2.9.0SQLServerCentralhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comWed, 19 Jun 2013 14:46:22 GMT20http://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspxI like Sean's solution and got to wondering whether a subquery would work as well:[code="sql"]SELECT t.*, isnull(( select top 1 ItemCode as ItemCode from #tTestTB t2 where t2.TreeType = 'S' and t2.VisOrder < t.VisOrder order by VisOrder desc ), '') as ItemCodeFROM #tTestTB t[/code]So I tried a small test harness:[code="sql"]IF OBJECT_ID('TempDB..#tTestTB') IS NOT NULLDROP TABLE #tTestTBCREATE TABLE #tTestTB( [VisOrder] [Int] IDENTITY (0,1) NOT NULL, [ItemCode] [varchar](25) NULL, [TreeType] [varchar] (1) NULL ) SET NOCOUNT ONINSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3922U-1ARA','N')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'MULTI-DOCK-BUNDLE1+','S')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3934U-1PRP','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3922U-1ARA','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PL10436401','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PL10436401-10pk+','S')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PL10436401','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'MULTI-DOCK-BUNDLE3+','S')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3934U-1PRP','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3956U-1PRP','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PL10436401','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3922U-1ARA','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA1495U-1TWC','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PA3945U-1EAB','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PL10436401-2PK+','S')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( 'PL10436401','I')INSERT INTO #tTestTB ( ItemCode,TreeType) VALUES ( '920-003594','N');WITH Tally(n) AS ( SELECT TOP 1000 ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM sys.all_columns a CROSS JOIN sys.all_columns b)INSERT INTO #tTestTBSELECT ItemCode + '-' + CAST(n AS VARCHAR(7)) ,TreeTypeFROM #tTestTBCROSS APPLY TallyDECLARE @Other VARCHAR(25)PRINT 'Subquery'SET STATISTICS TIME ONSELECT @Other=isnull(( select top 1 ItemCode as ItemCode from #tTestTB t2 where t2.TreeType = 'S' and t2.VisOrder < t.VisOrder order by VisOrder desc ), '') --as ItemCodeFROM #tTestTB tSET STATISTICS TIME OFFPRINT 'Outer Apply'SET STATISTICS TIME ONSELECT @Other=isnull(x.ItemCode, '') --as ItemCodeFROM #tTestTB touter apply( select top 1 ItemCode as ItemCode from #tTestTB t2 where t2.TreeType = 'S' and t2.VisOrder < t.VisOrder order by VisOrder desc) xSET STATISTICS TIME OFF DROP TABLE #tTestTB[/code]And got these results:[code="plain"]Subquery SQL Server Execution Times: CPU time = 17972 ms, elapsed time = 18181 ms.Outer Apply SQL Server Execution Times: CPU time = 18330 ms, elapsed time = 18699 ms.[/code]Over many runs, I think such close results would probably go back and forth. There is only a slight difference in the execution plans.Obviously I have too much time on my hands late this Friday afternoon. :-PFri, 22 Feb 2013 03:25:21 GMTdwain.chttp://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspxThanks. I really appreciate your help.Thu, 21 Feb 2013 07:13:26 GMTmiker 8667http://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspxThanks for the details. Makes this kind of thing a lot easier!!!Something like this?[code]SELECT t.*, isnull(x.ItemCode, '') as ItemCodeFROM #tTestTB touter apply(select top 1 ItemCode as ItemCode from #tTestTB t2 where t2.TreeType = 'S' and t2.VisOrder < t.VisOrder order by VisOrder desc) x[/code]Wed, 20 Feb 2013 13:28:26 GMTSean Langehttp://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspx[code="sql"] DECLARE @ID INT = 2 SELECT TOP 1 * FROM #tTestTB WHERE VisOrder < @ID AND TreeType = 'S' AND EXISTS(SELECT * FROM #tTestTB WHERE VisOrder = @ID AND TreeType <> 'S') ORDER BY VisOrder DESC[/code]Wed, 20 Feb 2013 13:25:27 GMTAlexander Suprunhttp://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspxThanks Sean, Please tell me if this is correct:[code="other"]IF OBJECT_ID('TempDB..#tTestTB') IS NOT NULLDROP TABLE #tTestTBCREATE TABLE #tTestTB( [VisOrder] [Int] NULL, [ItemCode] [varchar](25) NULL, [TreeType] [varchar] (1) NULL ) INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 0,'PA3922U-1ARA','N')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 1, 'MULTI-DOCK-BUNDLE1+','S')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 2, 'PA3934U-1PRP','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 3, 'PA3922U-1ARA','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 4, 'PL10436401','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 5, 'PL10436401-10pk+','S')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 6, 'PL10436401','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 7, 'MULTI-DOCK-BUNDLE3+','S')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 8, 'PA3934U-1PRP','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 9, 'PA3956U-1PRP','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 10, 'PL10436401','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 11, 'PA3922U-1ARA','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 12, 'PA1495U-1TWC','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 13, 'PA3945U-1EAB','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 14, 'PL10436401-2PK+','S')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 15, 'PL10436401','I')INSERT INTO #tTestTB ( VisOrder,ItemCode,TreeType) VALUES ( 16, '920-003594','N') SELECT * FROM #tTestTB DROP TABLE #tTestTB[/code]My Desire is to run this on a line by line basis. When run against line 0 the result would be blankSame for line 1Line 2 - 4 would return 'MULTI-DOCK-BUNDLE1+'Line 5 is blankLine 6 Returns 'PL10436401-10pk+' despite line 4 containing the same informationThank you for your helpWed, 20 Feb 2013 13:00:46 GMTmiker 8667http://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspxI am pretty sure of what you are looking for. Can you take a few minutes to read the article found in my signature about best practices when posting questions? To offer much assistance we need ddl and sample data to work with and that article explains how to gather that information and post it in a readily consumable format.Wed, 20 Feb 2013 12:28:35 GMTSean Langehttp://www.sqlservercentral.com/Forums/Topic1422230-392-1.aspxHey Guys, I'm trying to find the ItemCode of the TreeType 'S' Above the Line that I'm running the query against.Here is the Table:[code="other"]VisOrder ItemCode TreeType0 PA3922U-1ARA N1 MULTI-DOCK-BUNDLE1+ S2 PA3934U-1PRP I3 PA3922U-1ARA I4 PL10436401 I5 PL10436401-10pk+ S6 PL10436401 I7 MULTI-DOCK-BUNDLE3+ S8 PA3934U-1PRP I9 PA3956U-1PRP I10 PL10436401 I11 PA3922U-1ARA I12 PA1495U-1TWC I13 PA3945U-1EAB I14 PL10436401-2PK+ S15 PL10436401 I16 920-003594 N[/code]The Resulting Code for PA3934U-1PRP on visorder 2 Should be MULTI-DOCK-BUNDLE1+ while being run against visorder 8 should be MULTI-DOCK-BUNDLE3+.Running PA3922U-1ARA from visOrder 3 Should also return MULTI-DOCK-BUNDLE1+ Etc. And running against a line with treetype 'S' OR 'N' Should not return anything. Thanks for your help.Wed, 20 Feb 2013 11:42:12 GMTmiker 8667