mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-01 12:01:58 +00:00
7 lines
328 B
SQL
7 lines
328 B
SQL
DROP TABLE IF EXISTS nulls;
|
|
set allow_deprecated_syntax_for_merge_tree=1;
|
|
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;
|