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Anonymous
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6 years ago
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Query - Find max date for each customer, if null take last previous transaction date, by month year

Hi,

 

I have a table with transaction dates for each customer.

Then I have date table with dates, months, years.

 

I want to have a new table that will show for each customer his last transaction date per month/year.

If transaction date is missing in one month&year then take previous transaction date.

 

Example

Result

Thank you!

Mike

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