select case when sum( (amount_in_usd + amount_out_usd) / 2) is null then 0
else sum( (amount_in_usd + amount_out_usd) / 2) end as volume_usd ,
concat(symbol_in,' -> ',symbol_out) as pairs
from ethereum.sushi.ez_swaps
where BLOCK_TIMESTAMP::date >= '2022-01-01'
group by 2
order by 1 desc
limit 10