mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 13:42:02 +00:00
10 lines
608 B
SQL
10 lines
608 B
SQL
create table if not exists sample_prewhere (date Date, id Int32, time Int64) engine = MergeTree partition by date order by (id, time, intHash64(time)) sample by intHash64(time);
|
|
|
|
insert into sample_prewhere values ('2019-01-01', 2, toDateTime('2019-07-20 00:00:01'));
|
|
insert into sample_prewhere values ('2019-01-01', 1, toDateTime('2019-07-20 00:00:02'));
|
|
insert into sample_prewhere values ('2019-01-02', 3, toDateTime('2019-07-20 00:00:03'));
|
|
|
|
select id from remote('127.0.0.{1,3}', currentDatabase(), sample_prewhere) SAMPLE 1 where toDateTime(time) = '2019-07-20 00:00:00';
|
|
|
|
drop table sample_prewhere;
|