superflyPurchases in these three blockchains
    Updated 2022-07-18
    SELECT block_timestamp::date as date,
    COUNT(DISTINCT(BUYER)) AS nft_buyers,
    'flow' AS blockchain
    FROM flow.core.fact_nft_sales
    where block_timestamp::date between '2022-03-01' and '2022-07-18'
    GROUP BY date
    UNION
    SELECT block_timestamp::date as date,
    COUNT(DISTINCT(BUYER_ADDRESS)) AS nft_buyers,
    'eth' AS blockchain
    FROM ethereum.core.ez_nft_sales
    where block_timestamp::date between '2022-03-01' and '2022-07-18'
    GROUP BY date
    UNION
    SELECT block_timestamp::date as date,
    COUNT(DISTINCT(PURCHASER)) AS nft_buyers,
    'solana' AS blockchain
    FROM solana.core.fact_nft_sales
    where block_timestamp::date between '2022-03-01' and '2022-07-18'
    GROUP BY date
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