i have to make sum of values using php : i have a database table having date and amount column, i have to make the some of them monthly, so how can i do it.
[Please refer image for database table][1]. actually i wanted the output as 
in this month this much is the total, eg if we have 5 entries in the month of jan then i wanted the sum of all the 5 entries in the month of jan, how can i do it........................................................................................................


  [1]: http://i.stack.imgur.com/pSMdL.png