mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-11 18:14:03 +00:00
33 lines
1.4 KiB
SQL
33 lines
1.4 KiB
SQL
DROP TABLE IF EXISTS test.limit_by;
|
|
CREATE TABLE test.limit_by (Num UInt32, Name String) ENGINE = Memory;
|
|
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (1, 'John');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (1, 'John');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (3, 'Mary');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (3, 'Mary');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (3, 'Mary');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (4, 'Mary');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (4, 'Mary');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (5, 'Bill');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (7, 'Bill');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (7, 'Bill');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (7, 'Mary');
|
|
INSERT INTO test.limit_by (Num, Name) VALUES (7, 'John');
|
|
|
|
-- Two elemens in each group
|
|
SELECT Num FROM test.limit_by ORDER BY Num LIMIT 2 BY Num;
|
|
|
|
-- LIMIT BY doesn't affect result of GROUP BY
|
|
SELECT Num, count(*) FROM test.limit_by GROUP BY Num ORDER BY Num LIMIT 2 BY Num;
|
|
|
|
-- LIMIT BY can be combined with LIMIT
|
|
SELECT Num, Name FROM test.limit_by ORDER BY Num LIMIT 1 BY Num, Name LIMIT 3;
|
|
|
|
-- Distributed LIMIT BY
|
|
SELECT dummy FROM remote('127.0.0.{1,2}', system.one) LIMIT 1 BY dummy;
|
|
SELECT dummy FROM remote('127.0.0.{1,2}', system.one) LIMIT 2 BY dummy;
|
|
|
|
SELECT 1 as one FROM remote('127.0.0.{1,2}', system.one) LIMIT 1 BY one;
|
|
|
|
DROP TABLE IF EXISTS test.limit_by;
|