mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-21 23:21:59 +00:00
13 lines
543 B
SQL
13 lines
543 B
SQL
DROP TABLE IF EXISTS test_joinGet;
|
|
|
|
CREATE TABLE test_joinGet(user_id Nullable(Int32), name String) Engine = Join(ANY, LEFT, user_id);
|
|
|
|
INSERT INTO test_joinGet VALUES (2, 'a'), (6, 'b'), (10, 'c'), (null, 'd');
|
|
|
|
SELECT toNullable(toInt32(2)) user_id WHERE joinGet(test_joinGet, 'name', user_id) != '';
|
|
|
|
-- If the JOIN keys are Nullable fields, the rows where at least one of the keys has the value NULL are not joined.
|
|
SELECT cast(null AS Nullable(Int32)) user_id WHERE joinGet(test_joinGet, 'name', user_id) != '';
|
|
|
|
DROP TABLE test_joinGet;
|