select block_timestamp::date as date,
sum(zeroifnull(event_amount)) as Luna_delegated,
sum(Luna_delegated) over (order by date) as delegated_Luna
from terra.staking
where validator_address = 'terravaloper12r8929na0amxfj406zw7vk8jmd03fmzcj9r2gg'
group by 1
order by 1