## Not sure how to transpose a table like this...

 Author Message xusword Forum Newbie Group: General Forum Members Points: 2 Visits: 5 Let's assume I have a table like thisSELECT * FROM PointsPointID Axis ValueP1 X 10P1 Y 20P2 X 30P2 Y 40I was wondering what query can I write that can return the followingPointID X YP1 10 20P2 30 40Any suggestions?thanks Evil Kraig F SSC Guru Group: General Forum Members Points: 52819 Visits: 7660 The keywords you want to use to search for are either PIVOT or CROSSTAB. Either method will work for you. - Craig FarrellNever stop learning, even if it hurts. Ego bruises are practically mandatory as you learn unless you've never risked enough to make a mistake. For better assistance in answering your questions | Forum NetiquetteFor index/tuning help, follow these directions. |Tally TablesTwitter: @AnyWayDBA xusword Forum Newbie Group: General Forum Members Points: 2 Visits: 5 ThanksThe query would beselect PointID, X, Yfrom Pointspivot( max(Value) for Axis in (X, Y)) Jeff Moden SSC Guru Group: General Forum Members Points: 510758 Visits: 44296 In many cases, people who have these types of Pivots also eventually want a "Total" column. The ancient "Black Art" of CROSSTABs easily allows for such a thing.` SELECT PointID ,X = SUM(CASE WHEN Axis = 'X' THEN Value ELSE '' END) ,Y = SUM(CASE WHEN Axis = 'Y' THEN Value ELSE '' END) ,Total = SUM(Value) FROM cteTestData GROUP BY PointID;`Result Set:`PointID X Y Total------- ----------- ----------- -----------P1 10 20 30P2 30 40 70`CROSSTABs also make it pretty easy to do other things. For example...` SELECT PointID = CASE WHEN GROUPING(PointID) = 0 THEN PointID ELSE 'Total' END ,X = SUM(CASE WHEN Axis = 'X' THEN Value ELSE '' END) ,Y = SUM(CASE WHEN Axis = 'Y' THEN Value ELSE '' END) ,Total = SUM(Value) FROM cteTestData GROUP BY PointID WITH ROLLUP;`Result Set:`PointID X Y Total------- ----------- ----------- -----------P1 10 20 30P2 30 40 70Total 40 60 100`The following article also explains how to do multiple column types in Pivots and CROSSTABs, explains the performance advantages of "pre-aggregation", along with a demonstration that pre-aggregatedCROSSTABs are frequently almost twice as fast as pre-aggregated Pivots. It can really make a difference in being able to meet and beat reporting SLAs. The second link demonstrates the simple power of dynamic CROSSTABs for things like perpetual sliding window reports with no code change based on GETDATE() alone.http://www.sqlservercentral.com/articles/T-SQL/63681/http://www.sqlservercentral.com/articles/Crosstab/65048/To be honest, I don't ever use Pivot. I always use CROSSTABs, instead, for all the reasons previously stated and for their ease in readability. --Jeff ModenRBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.First step towards the paradigm shift of writing Set Based code: Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair Helpful Links:How to post code problemsHow to post performance problemsForum FAQs