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calculation that sums 1 for each month

I am using direct query to connect to my dimension and fact table.

 

I have 1 fact table and 2 dimension tables and need a way to sum (1) in each column for each month between a beginning and end date contained in the fact table.

 

This is an example of the fact table:

[cust key] [plan key] [beginning date key] [ending date key]

123           10            20160701                   20161231

456           10            20140101                   20991231

789           15            20160101                   20160630

012           15            20150715                   20171231

345           20            20160315                   20160930

 

This is an example of what I need from the fact table:

 

[cust] [plan] [jan 16] [feb 16] [mar 16] [apr 16] [may 16] [jun 16] [jul 16] [aug 16] [sep 16] [oct 16] [nov 16] [dec 16] [total]

123    10                                                                                         1          1            1            1           1            1            6

456    10      1            1           1            1            1             1           1          1            1            1           1            1            12

789    15                                                                            1                                                                                            1

012    15      1            1           1            1            1             1           1          1            1            1           1            1            12

345    20                                 1            1            1             1           1          1            1                                                     7

                    2            2           3            3            3             4           4          4            4            3           3            3            38

 

I need the report to show a one in each month even though I don't have a count in each month plus it needs to be able to calculate under all critera pulls.

 

Thank you in advance for any help on this. 


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