select delegator ,

min (BLOCK_TIMESTAMP) min_date

from flow.core.ez_staking_actions

where ACTION in ('TokensCommitted','DelegatorTokensCommitted')

group by 1

select date_trunc(week,min_date) weekly ,

count (DISTINCT delegator) new_stakers,

sum (new_stakers) over (order by weekly ) cum_new_stakers

from stakers

GROUP by 1