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| # db
CREATE DATABASE dp;
# table
use dp;
CREATE TABLE random_data_max (
date String,
val UInt8,
timestamp Datetime64
)ENGINE=MergeTree()
PARTITION by toYYYYMMDD(timestamp)
ORDER BY timestamp;
# data insert
INSERT INTO random_data_max(date, val,timestamp) SELECT today(), number,now() FROM numbers(100);
# db infos | 压缩率信息等
select
database,
table,
formatReadableSize(size) as size,
formatReadableSize(bytes_on_disk) as bytes_on_disk,
formatReadableSize(data_uncompressed_bytes) as data_uncompressed_bytes,
formatReadableSize(data_compressed_bytes) as data_compressed_bytes,
compress_rate,
rows,
days,
formatReadableSize(avgDaySize) as avgDaySize
from
(
select
database,
table,
sum(bytes) as size,
sum(rows) as rows,
min(min_date) as min_date,
max(max_date) as max_date,
sum(bytes_on_disk) as bytes_on_disk,
sum(data_uncompressed_bytes) as data_uncompressed_bytes,
sum(data_compressed_bytes) as data_compressed_bytes,
(data_compressed_bytes / data_uncompressed_bytes) * 100 as compress_rate,
max_date - min_date as days,
size / (max_date - min_date) as avgDaySize
from system.parts
where active
and database = 'dp'
group by
database,
table
) FORMAT Vertical;
|
