mysql : timestamp this month, last month and every month -

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i have following mysql table

amount  timestamp 3       1367638029 4       1367638029 5       1366445119 8       1366445200

how return sum(amount) based on month (not last 30 day) , last month below

            total amount month  7 last month  13

this canbe done way:

select sum(amount) yourtable month(from_unixtime(timestamp)) in/between ... -- consider year(...)as group month(from_unixtime(timestamp))

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