Updated 2022-08-07
    with optimism as (
    select a.block_timestamp::date as date, avg(b.tx_fee) as avg_fee_eth, 'Average Optimisim Tx Fee' as type
    from optimism.core.fact_event_logs a left join optimism.core.fact_transactions b on a.tx_hash = b.tx_hash
    where a.block_timestamp::date >= '2022-04-01'
    and a.event_name = 'Swap'
    group by 1
    ),
    ethereum as (
    select a.block_timestamp::date as date, avg(b.tx_fee) as avg_fee_eth, 'Average Ethereum Tx Fee' as type
    from ethereum.core.ez_dex_swaps a left join ethereum.core.fact_transactions b on a.tx_hash = b.tx_hash
    where a.block_timestamp::date >= '2022-04-01'
    group by 1
    )
    select * from optimism
    union
    select * from ethereum


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