## Convert Rows into Columns

 Author Message mpdillon SSC-Enthusiastic Group: General Forum Members Points: 154 Visits: 383 Comments posted to this topic are about the item Convert Rows into Columns kevriley SSCrazy Group: General Forum Members Points: 2813 Visits: 2606 Nice.A simpler (IMHO) way of determining the ROWID is to simply subtract the Remainder from the RowNumber, a technique used a lot in "Gaps and Islands" solutions.`select max(case when remainder = 0 then LotNo else '' end), max(case when remainder = 1 then LotNo else '' end), max(case when remainder = 2 then LotNo else '' end)from( select LotNo , ( row_number() over ( order by LotNo ) +2 ) % 3 as Remainder , row_number() over ( order by LotNo ) - ( row_number() over ( order by LotNo ) +2 ) % 3 as ROWID from lotno)agroup by ROWID ` Steph Locke SSC Veteran Group: General Forum Members Points: 231 Visits: 870 This seems really useful but the article formatting could do with a bit of improving - not many of codeblocks are correctly formatted Clif.Johnson-989960 Forum Newbie Group: General Forum Members Points: 1 Visits: 265 Here's a shorter version. Hope it helps. `SELECT [0] Col1,[1] Col2,[2] Col3FROM ( SELECT LotNo , ((ROW_NUMBER() OVER (ORDER BY LotNo)-1) % 3) col , ((ROW_NUMBER() OVER (ORDER BY LotNo)-1) / 3) roww FROM (VALUES('A'),('B'),('C'),('D'),('E'),('F'),('G'),('H'),('I'),('J'),('K'),('L'),('M'),('N'),('O'),('P'),('Q'),('R'),('S'),('T'),('U'),('V'),('W'),('X'),('Y'),('Z'))t(LotNo) ) x PIVOT (MIN(LotNo) FOR col IN ([0],[1],[2])) p`(2008 required for VALUES) germany000 Forum Newbie Group: General Forum Members Points: 2 Visits: 6 Wouldn't it be easier to use PIVOT and UNPIVOT to transpose the columns?http://technet.microsoft.com/en-us/library/ms177410(v=sql.105).aspx Luis Cazares SSChampion Group: General Forum Members Points: 10400 Visits: 18513 I once had a similar requirement and the best option was to generate the columns in the reporting tool. That was on VFP and I'm not sure if it's possible to do it in every reporting tool available, but it would certainly be easier to maintain and understand (single column from recordset printed in several columns on the report).However, if someone needs to do it in T-SQL, it's a good option, but certainly the CASE statement is not necessary.`WITH MstrTable AS( SELECT LotNo , ( ROW_NUMBER() OVER ( ORDER BY LotNo ) + 2 ) % 3 as Remainder , ( ROW_NUMBER() OVER ( ORDER BY LotNo ) + 2 ) / 3 as RowID FROM LotNo)SELECT MAX ( CASE WHEN remainder = 0 THEN LotNo ELSE '' END ) as Col1 ,MAX ( CASE WHEN remainder = 1 THEN LotNo ELSE '' END ) as Col2 ,MAX ( CASE WHEN remainder = 2 THEN LotNo ELSE '' END ) as Col3FROM mstrtableGROUP BY ROWID;--Second option just for fun, but shouldn't be better and might be worse.WITH Groups AS( SELECT LotNo , NTILE( (SELECT COUNT(*) FROM LotNo) / 3 + 1) OVER(ORDER BY LotNo) as RowID FROM LotNo),mstrtable AS( SELECT LotNo, RowID, ROW_NUMBER() OVER( PARTITION BY RowID ORDER BY LotNo) AS remainder FROM Groups)SELECT MAX ( CASE WHEN remainder = 1 THEN LotNo ELSE '' END ) as Col1 ,MAX ( CASE WHEN remainder = 2 THEN LotNo ELSE '' END ) as Col2 ,MAX ( CASE WHEN remainder = 3 THEN LotNo ELSE '' END ) as Col3FROM mstrtableGROUP BY ROWID;` Luis C.General Disclaimer:Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?How to post data/code on a forum to get the best help: Option 1 / Option 2 Robert.Sterbal SSC Veteran Group: General Forum Members Points: 243 Visits: 2000 Looks like a great technique, although more than half the sites I support are SQL Server 2KI'll have to figure out how to do this in excel (with the so I can take a column and spread it into 3.Thanks! Luis Cazares SSChampion Group: General Forum Members Points: 10400 Visits: 18513 Robert.Sterbal (7/17/2014)Looks like a great technique, although more than half the sites I support are SQL Server 2KI'll have to figure out how to do this in excel (with the so I can take a column and spread it into 3.Thanks!Hey Robert,For 2000, you could use a temp table with a new identity to ensure the gaps are not a problem.Here's an example using the same data as the article.`SELECT IDENTITY( int, 3, 1) AS RowNo, --Note the Identity definition starts at 3 LotNoINTO #LotNoFROM LotNoSELECT MAX( CASE WHEN RowNo % 3 = 0 THEN LotNo ELSE '' END) AS Column1, MAX( CASE WHEN RowNo % 3 = 1 THEN LotNo ELSE '' END) AS Column2, MAX( CASE WHEN RowNo % 3 = 2 THEN LotNo ELSE '' END) AS Column3FROM #LotNoGROUP BY RowNo / 3DROP TABLE #LotNo` Luis C.General Disclaimer:Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?How to post data/code on a forum to get the best help: Option 1 / Option 2 ScottPletcher SSCarpal Tunnel Group: General Forum Members Points: 4671 Visits: 6837 You really need only a single ROW_NUMBER function:`SELECT MAX(CASE WHEN row_num % 3 = 0 THEN LotNo ELSE '' END) AS Lot1, MAX(CASE WHEN row_num % 3 = 1 THEN LotNo ELSE '' END) AS Lot2, MAX(CASE WHEN row_num % 3 = 2 THEN LotNo ELSE '' END) AS Lot3 FROM ( SELECT LotNo, ROW_NUMBER() OVER(ORDER BY LotNo) + 2 AS row_num FROM LotNo) AS derivedGROUP BY row_num / 3` SQL DBA,SQL Server MVP('07, '08, '09)Prosecutor James Blackburn, in closing argument in the "Fatal Vision" murders trial: "If in the future, you should cry a tear, cry one for them [the murder victims]. If in the future, you should say a prayer, say one for them. And if in the future, you should light a candle, light one for them." sgross 10581 Forum Newbie Group: General Forum Members Points: 2 Visits: 13 Is it possible to make this dynamic to discover the needed columns without Dynamic SQL?