SELECT date_trunc('day',a.block_timestamp) as date,
avg(datediff(second, a.block_timestamp,b.block_timestamp)) as avg_time_diff,
max(datediff(second, a.block_timestamp,b.block_timestamp)) as max_time_diff,
min(datediff(second, a.block_timestamp,b.block_timestamp)) as min_time_diff
FROM solana.core.fact_blocks a, solana.core.fact_blocks b
WHERE a.block_id = b.block_id -1
-- AND a.block_timestamp::date = current_date -1
AND date< current_date
GROUP BY date
ORDER BY date DESC