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8 lines
459 B
MySQL
8 lines
459 B
MySQL
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DROP TABLE IF EXISTS t;
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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;
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INSERT INTO t SELECT 1 AS key, today() + (number % 30), number FROM numbers(1000);
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ALTER TABLE t UPDATE value = 0 WHERE (value > 0) AND (created_at >= '2021-12-21') SETTINGS allow_experimental_projection_optimization = 1;
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