select block_timestamp::date as date,
count( DISTINCT inner_instruction:instructions[0]:parsed:info:destination ) as DelegatorAccount
from solana.events
where block_timestamp::date >= '2022-03-01'
and instruction:programId = 'MarBmsSgKXdrN1egZf5sqe1TMai9K1rChYNDJgjq7aD'
and inner_instruction:instructions[0]:parsed:info:source = '7GgPYjS5Dza89wV6FpZ23kUJRG5vbQ1GM25ezspYFSoE'
GROUP by date
order by 1