mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-21 09:10:48 +00:00
6 lines
282 B
SQL
6 lines
282 B
SQL
DROP TABLE IF EXISTS nulls;
|
|
CREATE TABLE nulls (d Date, x Nullable(UInt64)) ENGINE = MergeTree(d, d, 8192);
|
|
INSERT INTO nulls SELECT toDate('2000-01-01'), number % 10 != 0 ? number : NULL FROM system.numbers LIMIT 10000;
|
|
SELECT count() FROM nulls WHERE x IS NULL;
|
|
DROP TABLE nulls;
|