use test; drop table if exists X; drop table if exists Y; create table X (id Int32, x_a String, x_b Nullable(Int32)) engine Memory; create table Y (id Int32, y_a String, y_b Nullable(String)) engine Memory; insert into X (id, x_a, x_b) values (1, 'l1', 1), (2, 'l2', 2), (2, 'l3', 3), (3, 'l4', 4); insert into X (id, x_a) values (4, 'l5'), (4, 'l6'), (5, 'l7'), (8, 'l8'), (9, 'l9'); insert into Y (id, y_a) values (1, 'r1'), (1, 'r2'), (2, 'r3'), (3, 'r4'), (3, 'r5'); insert into Y (id, y_a, y_b) values (4, 'r6', 'nr6'), (6, 'r7', 'nr7'), (7, 'r8', 'nr8'), (9, 'r9', 'nr9'); select 'inner'; select X.*, Y.* from X inner join Y on X.id = Y.id order by id; select 'inner subs'; select s.*, j.* from (select * from X) as s inner join (select * from Y) as j on s.id = j.id order by id; select 'inner expr'; select X.*, Y.* from X inner join Y on (X.id + 1) = (Y.id + 1) order by id; select 'left'; select X.*, Y.* from X left join Y on X.id = Y.id order by id; select 'left subs'; select s.*, j.* from (select * from X) as s left join (select * from Y) as j on s.id = j.id order by id; select 'left expr'; select X.*, Y.* from X left join Y on (X.id + 1) = (Y.id + 1) order by id; select 'right'; select X.*, Y.* from X right join Y on X.id = Y.id order by id; select 'right subs'; select s.*, j.* from (select * from X) as s right join (select * from Y) as j on s.id = j.id order by id; --select 'right expr'; --select X.*, Y.* from X right join Y on (X.id + 1) = (Y.id + 1) order by id; select 'full'; select X.*, Y.* from X full join Y on X.id = Y.id order by id; select 'full subs'; select s.*, j.* from (select * from X) as s full join (select * from Y) as j on s.id = j.id order by id; --select 'full expr'; --select X.*, Y.* from X full join Y on (X.id + 1) = (Y.id + 1) order by id; select 'self inner'; select X.*, s.* from X inner join (select * from X) as s on X.id = s.id order by X.id; select 'self inner nullable'; select X.*, s.* from X inner join (select * from X) as s on X.x_b = s.x_b order by X.id; select 'self inner nullable vs not nullable'; select X.*, s.* from X inner join (select * from X) as s on X.id = s.x_b order by X.id; -- TODO: s.y_b == '' instead of NULL select 'self inner nullable vs not nullable 2'; select Y.*, s.* from Y inner join (select * from Y) as s on concat('n', Y.y_a) = s.y_b order by id; select 'self left'; select X.*, s.* from X left join (select * from X) as s on X.id = s.id order by X.id; select 'self left nullable'; select X.*, s.* from X left join (select * from X) as s on X.x_b = s.x_b order by X.id; select 'self left nullable vs not nullable'; select X.*, s.* from X left join (select * from X) as s on X.id = s.x_b order by X.id; -- TODO: s.y_b == '' instead of NULL select 'self left nullable vs not nullable 2'; select Y.*, s.* from Y left join (select * from Y) as s on concat('n', Y.y_a) = s.y_b order by id; select 'self right'; select X.*, s.* from X right join (select * from X) as s on X.id = s.id order by X.id; select 'self right nullable'; select X.*, s.* from X right join (select * from X) as s on X.x_b = s.x_b order by X.id; select 'self right nullable vs not nullable'; select X.*, s.* from X right join (select * from X) as s on X.id = s.x_b order by X.id; --select 'self right nullable vs not nullable 2'; --select Y.*, s.* from Y right join (select * from Y) as s on concat('n', Y.y_a) = s.y_b order by id; select 'self full'; select X.*, s.* from X full join (select * from X) as s on X.id = s.id order by X.id; select 'self full nullable'; select X.*, s.* from X full join (select * from X) as s on X.x_b = s.x_b order by X.id; select 'self full nullable vs not nullable'; select X.*, s.* from X full join (select * from X) as s on X.id = s.x_b order by X.id; --select 'self full nullable vs not nullable 2'; --select Y.*, s.* from Y full join (select * from Y) as s on concat('n', Y.y_a) = s.y_b order by id; drop table X; drop table Y;