Aggregation for Union Requests

Hi All,
I have created a union request in Answers. there are 2 different requests in the union request.
Request1
there are 4 columns, first one is the hardcoded column
Request2
there are 4 columns, in this also first one is the hardcoded column
In the first request i want to display 3rd column as it is, but in the second request i want it to display as AVG based on the year.
I have written the formula in the request 2 of the 3rd column, but in request 1 i haven't written anything.
When i am viewing the data in pivot table, it is like aggregation rule specified in the request2 of 3 column is also applied to the request1 of 3rd column.
Can any one help me out of this situation. how can i make that only for 2 request the aggregation rule is applied not for the first one.
Thanks in advance
Regards
Vishwam

NO, its like....
1st measure= HR Events.Termination count
2 measure= AVG(HR Events.Headcount by Time.Quarter).
Can you please help me regarding this.....

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