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POData trending across table
 

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  1. POData trending across table
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    <p>I'm trying to work out a trend over a sql table which contains entries for files entering filesystem folders over a set time period. I have a table that contains the date periods and another containing all of the folders that I am interested in. When I join (right outer) the two I get a table like below:</p> <pre><code>Jan 2012, folder A 2 Jan 2012, folder B 4 Feb 2012, folder A 2 Feb 2012, folder B 2 </code></pre> <p>However if no information has been entered for a date interval I just get null values so March 2012, null, null</p> <p>Is there any way that I can add a zero into this table for each folder? This would give me:</p> <pre><code>Jan 2012, folder A 2 Jan 2012, folder B 4 Feb 2012, folder A 2 Feb 2012, folder B 2 Mar 2012, folder A 0 Mar 2012, folder B 0 </code></pre> <p>I then need to work out a trend over the months for each folder so that the difference between Jan and Feb for folder A is 0 and -200% between Feb and Mar. This would give me a final table of:</p> <pre><code>Jan 2012, folder A 2 0 (first month no data) Jan 2012, folder B 4 0 (first month no data) Feb 2012, folder A 2 200% (increase on Jan) Feb 2012, folder B 2 -50% (decrease on Jan) Mar 2012, folder A 0 -200% (decrease on Feb) Mar 2012, folder B 0 -200% (decrease on Feb) </code></pre> <p>This will eventually end up in an ssrs report so it doesn't matter if the trending happens in the query or through the report builder.</p> <p>Any help with this would be greatly appreciated.</p> <p>My table schemas look like:</p> <p>Folder Table:</p> <pre><code>DECLARE @folders TABLE ( folderId int, folderPath varchar(500)) </code></pre> <p>Files Table: </p> <pre><code>DECLARE @filessAdded TABLE ( fileId int, parentId int, folderPath varchar(500), eventDate DATETIME, folderId int ); </code></pre> <p>Date Table - populated dynamically based on date intervals in given period eg months:</p> <pre><code>DECLARE @dates TABLE ( DateOf VARCHAR(500) ); </code></pre> <p>My final query looks like the following:</p> <pre><code>select isnull(Total,0), folder, dates.DateOf, trend from @filesAdded as files right join @dates as dates on files.DateOf = dates.DateOf </code></pre>
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    1. USJosef K
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    1. COWhat is the query you are currently using? What does your data schema look like (i.e., table & field names)?
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    2. CO@Kievia: Shouldn't the %changes column read: 0, 0, 0, -50%, -100%, -100% ?
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    3. COYeah- case of writing too late
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