SELECT
block_timestamp::date AS dt,
COUNT(DISTINCT instruction:parsed:info:stakeAccount) AS Number_of_Accounts
FROM solana.events
WHERE
block_timestamp >= '2022-02-01'
AND event_type = 'delegate'
AND instruction:parsed:info:voteAccount ='DfpdmTsSCBPxCDwZwgBMfjjV8mF8xHkGRcXP8dJBVmrq'
Group By 1