Difference between aggregation and calculation tab in BEx Query Designer

HI,
I am using BEx Query Designer for my report, for the key figures in the coloumn area i slected one numeric key figures, in the properties tab i found aggregation tab and calculation tab.
I need to sum up the total values for that particualar coloumn, when i used calculation tab i found to sum all the values for a particular coloumn, then what is the use the aggreagation tab?
I not able to used that Aggregation tab it is showing as a hidden fields...
can any one tell me whats the exact difference between these tabs and when we need to use which tab?
With Regards,
Thanesh Kumar.

Hi Thanesh Kumar,
I moved this thread from forum Data Warehousing to Business Explorer since it is a query related question (as SDN moderator).
I could explain to you the difference between these two tabs.
For "calculation" tab, it changes the display of result and does not change the calculation logic.
It means that, if this key figure is used further in formula, still the original number (without "calculation" tab setting) is used for further formula calculation.
For "aggregation" tab, it changes the real calculation logic.
The system takes the setting as the aggregation rule for records.
The most common aggregation rule is of course summation. If you set to e.g. Average here, the system does the
Average instead of summation when aggregating records. And the Average value will be taken for calculation
in further formulas or other calculations.
For "aggregation" tab, you could only use it for CKF (calculated key figure) or formula and you could not use it for
a basic key figure. That should be the reason why you see it greyed-out.
Regards,
Patricia

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