mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-10 09:32:06 +00:00
10 lines
466 B
SQL
10 lines
466 B
SQL
DROP TABLE IF EXISTS t;
|
|
|
|
CREATE TABLE t (`key` UInt32, `created_at` Date, `value` UInt32, PROJECTION xxx (SELECT key, created_at, sum(value) GROUP BY key, created_at)) ENGINE = MergeTree PARTITION BY toYYYYMM(created_at) ORDER BY key;
|
|
|
|
INSERT INTO t SELECT 1 AS key, today() + (number % 30), number FROM numbers(1000);
|
|
|
|
ALTER TABLE t UPDATE value = 0 WHERE (value > 0) AND (created_at >= '2021-12-21') SETTINGS optimize_use_projections = 1;
|
|
|
|
DROP TABLE IF EXISTS t;
|