mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-22 07:31:57 +00:00
21 lines
601 B
MySQL
21 lines
601 B
MySQL
|
CREATE TABLE IF NOT EXISTS table_name
|
||
|
|
(
|
||
|
|
id UInt64
|
||
|
|
)
|
||
|
|
ENGINE = MergeTree()
|
||
|
|
ORDER BY cityHash64(id)
|
||
|
|
SAMPLE BY cityHash64(id);
|
||
|
|
|
||
|
|
INSERT INTO table_name SELECT rand() from system.numbers limit 10000;
|
||
|
|
INSERT INTO table_name SELECT rand() from system.numbers limit 10000;
|
||
|
|
INSERT INTO table_name SELECT rand() from system.numbers limit 10000;
|
||
|
|
INSERT INTO table_name SELECT rand() from system.numbers limit 10000;
|
||
|
|
INSERT INTO table_name SELECT rand() from system.numbers limit 10000;
|
||
|
|
|
||
|
|
select count() from table_name;
|
||
|
|
SELECT count() < 50 * 5 FROM (
|
||
|
|
SELECT * FROM table_name SAMPLE 50
|
||
|
|
);
|
||
|
|
|
||
|
|
DROP TABLE table_name;
|