mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 21:42:39 +00:00
11 lines
603 B
SQL
11 lines
603 B
SQL
create table if not exists t_group_by_lowcardinality(p_date Date, val LowCardinality(Nullable(String)))
|
|
engine=MergeTree() partition by p_date order by tuple();
|
|
|
|
insert into t_group_by_lowcardinality select today() as p_date, toString(number/5) as val from numbers(10000);
|
|
insert into t_group_by_lowcardinality select today() as p_date, Null as val from numbers(100);
|
|
|
|
select val, avg(toUInt32(val)) from t_group_by_lowcardinality group by val limit 10 settings max_threads=1, max_rows_to_group_by=100, group_by_overflow_mode='any' format JSONEachRow;
|
|
|
|
drop table if exists t_group_by_lowcardinality;
|
|
|