clickhouse get tables size

clickhouse-get-tables-size.sql

SELECT table,
    formatReadableSize(sum(bytes)) as size,
    min(min_date) as min_date,
    max(max_date) as max_date
    FROM system.parts
    WHERE active
GROUP BY table

More detailed with rows count and average day size

SELECT table, formatReadableSize(size) as size, rows, days, formatReadableSize(avgDaySize) as avgDaySize FROM (
    SELECT
        table,
        sum(bytes) AS size,
        sum(rows) AS rows,
        min(min_date) AS min_date,
        max(max_date) AS max_date,
        (max_date - min_date) AS days,
        size / (max_date - min_date) AS avgDaySize
    FROM system.parts
    WHERE active
    GROUP BY table
    ORDER BY rows DESC
)