mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 19:02:04 +00:00
18 lines
363 B
SQL
18 lines
363 B
SQL
CREATE TABLE test
|
|
(
|
|
dt Date,
|
|
id UInt32,
|
|
val Nullable(UInt32)
|
|
)
|
|
ENGINE = MergeTree(dt, id, 8192);
|
|
|
|
insert into test (dt, id, val) values ('2017-01-01', 1, 10);
|
|
insert into test (dt, id, val) values ('2017-01-01', 1, null);
|
|
insert into test (dt, id, val) values ('2017-01-01', 1, 0);
|
|
|
|
SELECT count()
|
|
FROM test
|
|
WHERE val = 0;
|
|
|
|
DROP TABLE IF EXISTS test;
|