Question

I’m working on trying to generate a report from a couple of database tables. The simplified version looks like this

Campaign ---------- CampaignID  Source ----------------------- Source_ID | Campaign_ID  Content --------------------------------------------------------- Content_ID | Campaign_ID | Content_Row_ID | Content_Value 

The report needs to read like this:

CampaignID - SourceID - ContentRowID(Value(A)) - ContentRowID(Value(B)) 

Where ContentRowID(Value(A)) means ‘Find a row the has a given CampaignID, and a ContentRowId of ‘A’ and then get the ContentValue for that row’

Essentially, I have to ‘pivot’ (I think that’s the correct term) the rows into columns…

It’s an Oracle 10g database…

Any suggestions?

Answer 1

This is my first stab at it. Refinement coming once I know more about the contents of the Content table.

First, you need a temporary table:

CREATE TABLE pivot (count integer); INSERT INTO pivot VALUES (1); INSERT INTO pivot VALUES (2); 

Now we’re ready to query.

SELECT campaignid, sourceid, a.contentvalue, b.contentvalue FROM content a, content b, pivot, source WHERE source.campaignid = content.campaignid AND pivot = 1 AND a.contentrowid = 'A' AND pivot = 2 AND b.contentrowid = 'B'