mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 03:12:43 +00:00
13 lines
519 B
MySQL
13 lines
519 B
MySQL
|
DROP TABLE IF EXISTS mt_compact;
|
||
|
|
|
||
|
|
CREATE TABLE mt_compact (d Date, id UInt32, s String)
|
||
|
|
ENGINE = MergeTree ORDER BY id PARTITION BY d
|
||
|
|
SETTINGS min_bytes_for_wide_part = 10000000, index_granularity = 128;
|
||
|
|
|
||
|
|
INSERT INTO mt_compact SELECT toDate('2020-01-05'), number, toString(number) FROM numbers(1000);
|
||
|
|
INSERT INTO mt_compact SELECT toDate('2020-01-06'), number, toString(number) FROM numbers(1000);
|
||
|
|
ALTER TABLE mt_compact MODIFY COLUMN s UInt64;
|
||
|
|
SELECT sum(s) from mt_compact;
|
||
|
|
|
||
|
|
DROP TABLE IF EXISTS mt_compact;
|