Hello oracle gurus ... I have a trouble with the following query ...

Question

Any help would be appreciated ...
My oracle database ...
producttype --|-- creationtime --|-- count
2 --|-- 4/07 --|-- 5
2 --|-- 5/07 --|-- 6
1 --|-- 5/07 --|-- 9
I need to write a query to populate a dataset. The table I should construct later will have to look like this, sort off ...
creationtime --|-- 1 (producttype) --|-- 2 (producttype)
4/07 --|-- 0 --|-- 5
5/07 --|-- 9 --|-- 6
The example is self explanatory and I wanted to make it as minimalistic as posible.
One other problem. When you look at that creationtime column up there. I will have to generate that separatelly as it seems to me. The user has an option to select a startdate and an enddate. My creationtime column will have to contain every month between those two dates the user had selected. That doesn't mean I will find EVERY month in the actual oracle database. However, I have to check for it and if a given month is not found I have to assign value "0" for both 1 and 2 (producttypes) and the month should still be present in the creationtime column in my dataset.
Any tips would be welcomed.
Thanks.

Answer 1

The example is self explanatory and I wanted to make it as minimalistic as posible.It is not self explanatory. Raw data can be interpreted in a number of ways: we need to understand what these things mean. Minimalism is fine (I'm a big Phillip Glass fan myself) but too little is not good enough. For instance, is COUNT a column name or the output of a COUNT function? Are there really only two ProductTypes?
Depending on the answers to those questions something like this query may or may not work for you...
select creationtime
          , sum(decode(producttype,1, count, 0)) as pt1
          , sum(decode(producttype,2, count, 0)) as pt2
from your_original_table
group by creationtime
/Cheers, APC
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