On 10/24/12 6:25 PM, Alexandre Benson Smith wrote:

> Em 24/10/2012 20:21, Doug Chamberlin escreveu:
>> On 10/24/12 5:54 PM, cornievs wrote:
>>> I have query which extract the sales per day from a table
>>>
>>> Select EXTRACT(YEAR from DT) as YEARNO, EXTRACT(YEARDAY from DT) AS DAYNO, SUM(DUE) from CLIENT_INVOICES group by YEARNO, WEEKNO.
>>>
>>> It works 100%, but only returns the dates with sales, I need it to also include the dates with zero sales, for example:
>>>
>>> YEARNO DAYNO SUM
>>> 2012 01 5000
>>> 2012 02 6000
>>> 2012 03 0 (or null will be fine)
>>> 2012 04 7000
>> I would crate a reference table that contains all the years and days
>> that you want to report on. Then join the data you have to that table
>> using an outer join so that all dates in the reference table are in the
>> result set and those that have data from the client invoices will show it.
>>
> I used to do this way, but with CTE you create that "table" dynamically,
> another option is using EXECUTE STATEMENT or a SP to loop trough the days

I saw that. However, I don't see the advantage. Using a reference table
is simpler and clearer than using CTE or other code to generate the
reference values.