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POT-SQL convert rows to columns when trying to get bottom 5 values as columns?
 

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  1. POT-SQL convert rows to columns when trying to get bottom 5 values as columns?
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    <p>I am using MS SQL Server 2005.</p> <p>I think PIVOT could help me here, but I can't figure it out. I must be over thinking. Here is the input</p> <pre><code>create table #myrows (id char(1), seq_i int, val char(10)) insert into #myrows values('A',1, 'A1') insert into #myrows values('A',2, 'A2') insert into #myrows values('A',3, 'A3') insert into #myrows values('A',4, 'A4') insert into #myrows values('A',5, 'A5') insert into #myrows values('A',6, 'A6') insert into #myrows values('A',7, 'A7') insert into #myrows values('A',8, 'A8') insert into #myrows values('A',9, 'A9') insert into #myrows values('A',10, 'A10') insert into #myrows values('B',1, 'B1') insert into #myrows values('B',2, 'B2') insert into #myrows values('B',3, 'B3') insert into #myrows values('B',4, 'B4') insert into #myrows values('B',5, 'B5') insert into #myrows values('B',6, 'B6') insert into #myrows values('C',1, 'C1') insert into #myrows values('C',2, 'C2') insert into #myrows values('C',3, 'C3') </code></pre> <p>I can do it with T-SQL when I passing the id. But I seems like there is an easy sql view that I could create that doesn't require me to send it the id. Here is the T-SQL that gets me the output I want for one id:</p> <pre><code>DECLARE @max_hierarchy int DECLARE @code CHAR(1) select @code = 'C' SELECT @max_hierarchy = max(seq_i) FROM #myrows WHERE id=@code SELECT top 1 (SELECT val from #myrows WHERE id=@code AND seq_i = @max_hierarchy) AS 'Level1', (SELECT val from #myrows WHERE id=@code AND seq_i = @max_hierarchy-1) AS 'Level2', (SELECT val from #myrows WHERE id=@code AND seq_i = @max_hierarchy-2) AS 'Level3', (SELECT val from #myrows WHERE id=@code AND seq_i = @max_hierarchy-3) AS 'Level4', (SELECT val from #myrows WHERE id=@code AND seq_i = @max_hierarchy-4) AS 'Level5' from #myrows WHERE id=@code </code></pre> <p>Ideally this would be be my output of SQL I am looking for:</p> <pre><code>Code Level1 Level2 Level3 Level4 Level5 ---- ----------- ----------- ----------- ----------- ----------- A A10 A9 A8 A7 A6 B B6 B5 B4 B3 B2 C C3 C2 C1 NULL NULL </code></pre>
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    1. USJeffJak
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      1. USKevin Auds
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    1. COThis sort of transformation is often better handled in the presentation layer than in SQL.
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      1. USJamie F
    2. CO@JamieF You might be right for most cases. However, check my answer. It's not *that* complicated and it's efficient. Coding that in presentation might a *little more* than 13 lines of code :)
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      1. USAdrian Carneiro
    3. CO@Adrian - Fair enough, CTE recursion is a nice answer, but your second bit of code is the more common requirement, and, IMHO, SQL methods for varying field counts are not as nice as, let say a Tablix in SSRS. (But I'll still give your answer a +1.)
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