blocktime,

coalesce(

volume - lag(volume) over (

order by

blocktime

),

0

) as change_from_last_month

from

(

select

date_trunc('Month', block_timestamp) as blocktime,

sum(amount_usd) as volume

from

ethereum.dex_swaps

where

token_address = '0xff56cc6b1e6ded347aa0b7676c85ab0b3d08b0fa'

group by

blocktime

)