Need to SUM the MIN() of Rows in a Matrix in SSRS 2008.

Experts:

I need to SUM the MIN() AMOUNT field wthin a row of data that is pulled into SSRS 2008. I have a Matrix and need the CODE that will tell the ROW CELL to Summarize the MIN of an Amount_Field because due to the report requirement, I have numerous rows of duplicated Amounts by ORDER_ID. I need to first of all tell the matrix to pick the MIN and then summarize all the MINS.

Currently my Amount Summary is way over-stated because of the duplicates.

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MIKESoftware Solutions ConsultantAsked:
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seenallConnect With a Mentor Commented:
Not sure I understand what aspect of code you refer to (Report Expressions etc)

But from an SQL Perspective - OLAP windowing comes into its own for this question, if I understand it correctly



select  sum(res.amount_field) amount_summary
from (
select order_id
     , amount_field
     , rank() over 
       (partition by order_id order by amount_field) ranked_amount
  from matrix_table
) res
where res.ranked_amount = 1

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MIKESoftware Solutions ConsultantAuthor Commented:
Actually, I need the SSRS "Expression" formula to do this within SSRS....

I"m using a Matrix
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