>So, I would like a SQL code to create a small tempCursor containing: a field tempCursor.sum from financial.price
>and tempCursor.month from financial.date

SELECT cMonth(Date) AS Month, SUM(Price) AS Sum ;
   FROM Financial ;
 GROUP BY Month(Date) ;
 INTO CURSOR TempCursor

Is the financial data going to had dates that span multiple years? IF so you would need to add a where clause for filtering for only the year you want.

SELECT cMonth(Date) AS Month, SUM(Price) AS Sum ;
   FROM Financial ;
WHERE Year(Date) = 2008 ;
 GROUP BY Month(Date) ;
 INTO CURSOR TempCursor

By grouping on Month instead of cMonth you will get the data ordered by chronological months rather than alphebetical months.