mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-28 10:31:57 +00:00
35 lines
898 B
SQL
35 lines
898 B
SQL
DROP TABLE IF EXISTS foo;
|
|
|
|
CREATE TABLE foo (ts DateTime, x UInt64)
|
|
ENGINE = MergeTree PARTITION BY toYYYYMMDD(ts)
|
|
ORDER BY (ts);
|
|
|
|
INSERT INTO foo (ts, x) SELECT toDateTime('2020-01-01 00:05:00'), number from system.numbers_mt LIMIT 10;
|
|
|
|
SET mutations_sync = 1;
|
|
|
|
ALTER TABLE foo UPDATE x = 1 WHERE x = (SELECT x from foo WHERE x = 4);
|
|
|
|
SELECT sum(x) == 42 FROM foo;
|
|
|
|
ALTER TABLE foo UPDATE x = 1 WHERE x IN (SELECT x FROM foo WHERE x != 0);
|
|
|
|
SELECT sum(x) == 9 FROM foo;
|
|
|
|
DROP TABLE IF EXISTS bar;
|
|
|
|
CREATE TABLE bar (ts DateTime, x UInt64)
|
|
ENGINE = Memory;
|
|
|
|
INSERT INTO bar (ts, x) SELECT toDateTime('2020-01-01 00:05:00'), number from system.numbers_mt LIMIT 10;
|
|
|
|
SET mutations_sync = 1;
|
|
|
|
ALTER TABLE bar UPDATE x = 1 WHERE x = (SELECT x from bar WHERE x = 4);
|
|
|
|
SELECT sum(x) == 42 FROM bar;
|
|
|
|
ALTER TABLE bar UPDATE x = 1 WHERE x IN (SELECT x FROM bar WHERE x != 0);
|
|
|
|
SELECT sum(x) == 9 FROM bar;
|