android - Sum over values by month in milliseconds -

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I have the table with the price and date from 1970 to integer and the date is Value in the integer in millisecond ... I need to get the amount (value) for each month and how do I do any idea with the date in milliseconds? possible? Thank you.

My Table "Entry" Amount | Date ---------------------------- 300 139 0075200000 150. 13 9 0132500000 20 | 13 9 1075200000 ... | .............

What do I have to achieve: 

  01.2014 | 450 02.2014 | 20 ....    
 
 
 You must be in the dates so that you are month:  Select month as SM (Value) as the sum of the entry group as 1 (*% Y-% m ', Date / 1000,' UnixPok ')  < / Ex>

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