mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 16:50:48 +00:00
36 lines
831 B
SQL
36 lines
831 B
SQL
drop table if exists t;
|
|
drop table if exists s;
|
|
drop table if exists y;
|
|
|
|
create table t(a Int64, b Int64) engine = Memory;
|
|
create table s(a Int64, b Int64) engine = Memory;
|
|
create table y(a Int64, b Int64) engine = Memory;
|
|
|
|
insert into t values (1,1), (2,2);
|
|
insert into s values (1,1);
|
|
insert into y values (1,1);
|
|
|
|
select s.a, s.a, s.b as s_b, s.b from t
|
|
left join s on s.a = t.a
|
|
left join y on s.b = y.b
|
|
order by t.a, s.a, s.b;
|
|
|
|
select max(s.a) from t
|
|
left join s on s.a = t.a
|
|
left join y on s.b = y.b
|
|
group by t.a order by t.a;
|
|
|
|
select t.a, t.a as t_a, s.a, s.a as s_a, y.a, y.a as y_a from t
|
|
left join s on t.a = s.a
|
|
left join y on y.b = s.b
|
|
order by t.a, s.a, y.a;
|
|
|
|
select t.a, t.a as t_a, max(s.a) from t
|
|
left join s on t.a = s.a
|
|
left join y on y.b = s.b
|
|
group by t.a order by t.a;
|
|
|
|
drop table t;
|
|
drop table s;
|
|
drop table y;
|