select block_timestamp::date as fecha,

seller_address as address

from ethereum.core.ez_nft_sales

),

buyers as (

select block_timestamp::date as fecha,

seller_address as address

from ethereum.core.ez_nft_sales

)

select date_trunc ('month', fecha) as dia,

count (distinct address) as unique_users

from (select * from sellers

union all

select * from buyers)

group by fecha

order by fecha desc