SET optimize_on_insert = 0; DROP TABLE IF EXISTS tags; CREATE TABLE tags ( id String, seqs Array(UInt8), create_time DateTime DEFAULT now() ) engine=ReplacingMergeTree() ORDER BY (id); INSERT INTO tags(id, seqs) VALUES ('id1', [1,2,3]), ('id2', [0,2,3]), ('id1', [1,3]); WITH (SELECT [0, 1, 2, 3]) AS arr1 SELECT arraySort(arrayIntersect(argMax(seqs, create_time), arr1)) AS common, id FROM tags WHERE id LIKE 'id%' GROUP BY id; DROP TABLE tags; -- https://github.com/ClickHouse/ClickHouse/issues/15294 drop table if exists TestTable; create table TestTable (column String, start DateTime, end DateTime) engine MergeTree order by start; insert into TestTable (column, start, end) values('test', toDateTime('2020-07-20 09:00:00'), toDateTime('2020-07-20 20:00:00')),('test1', toDateTime('2020-07-20 09:00:00'), toDateTime('2020-07-20 20:00:00')),('test2', toDateTime('2020-07-20 09:00:00'), toDateTime('2020-07-20 20:00:00')); SELECT column, (SELECT d from (select [1, 2, 3, 4] as d)) as d FROM TestTable where column == 'test' GROUP BY column; drop table TestTable; -- https://github.com/ClickHouse/ClickHouse/issues/11407 drop table if exists aaa; drop table if exists bbb; CREATE TABLE aaa ( id UInt16, data String ) ENGINE = MergeTree() PARTITION BY tuple() ORDER BY id; INSERT INTO aaa VALUES (1, 'sef'),(2, 'fre'),(3, 'jhg'); CREATE TABLE bbb ( id UInt16, data String ) ENGINE = MergeTree() PARTITION BY tuple() ORDER BY id; INSERT INTO bbb VALUES (2, 'fre'), (3, 'jhg'); with (select groupArray(id) from bbb) as ids select * from aaa where has(ids, id) order by id; drop table aaa; drop table bbb;