DB_sales over time
    Updated 2022-12-08
    WITH cte AS (
    SELECT
    date_trunc('day', block_timestamp) AS day,
    platform_name,
    count(*) AS num_sales
    FROM ethereum.core.ez_nft_sales
    WHERE block_timestamp >= '2022-10-19'
    AND platform_name IN ('opensea', 'blur', 'x2y2')
    GROUP BY 1, 2
    )

    SELECT
    day,
    SUM(CASE WHEN platform_name = 'opensea' THEN num_sales END) AS opensea_sales,
    SUM(CASE WHEN platform_name = 'blur' THEN num_sales END) AS blur_sales,
    SUM(CASE WHEN platform_name = 'x2y2' THEN num_sales END) AS x2y2_sales
    FROM cte
    GROUP BY day
    ORDER BY day ASC;

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