My heart leaps up when I behold a crosstab... (to mis-quote
Wordsworth). Imagine being able to tell your users that you can take about a quarter million cells of data, and summarize them into nine cells! Of course the assumption being that your data is amenable to that kind of extreme summarization. A picture being worth a thousand words I shall demonstrate, and illustrate, with screenshots. (I have never really tried to test that theory out.... is it really worth only a thousand words? Do you need a really large picture? Is there a formula that you can use to convert pixels into words? You get the drift; this can meander into a really exciting debate, one that I am not too inclined to enter, just not yet.)
Take the screenshot below. It is a table. It shows Profit, Sales, and Unit Sales data at the detail level. I.e. it shows data at the transactional level. I have included only the 'Region' level of the geography dimension. There are only three regions in my data set: East, Central, and West. Which is why these members repeat many, many times. But each row represents a transaction. And I have more than 87,000 transactions. This is a lot of data. You can imagine the excitement if this were to be a few million, billion rows. How do you make sense of this data? Or more precisely, how do you start to make sense of this data?
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One way to do is to summarize this data. And if you are using Discoverer, you can summarize this data in about three clicks . How? Simple. From your menu click the arrow to the right of the 'Add Worksheet' icon (that would be the sixth icon in the Discoverer toolbar).
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Or you could use the menu and select 'Edit' >> 'Duplicate Worksheet' >> 'As Crosstab'.
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Up pops a screen where you can adjust the layout of your crosstab.
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Click the 'OK' button and there you go! Nine cells of data. Profit, Sales, and Unit Sales have been summarized for each of the three regions.
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Simple, yet powerful (or is it powerful, yet simple?). Discoverer has had this capability for many, many releases now. Yet, as I read and scout the web for news and views, I hear that there are vendors that are aiming to bring out similar functionality only next year, or the year after next. How original.