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create table things ( id bigint primary key auto_increment, name text ); create table thing_values ( id bigint primary key auto_increment, oID bigint, foreign key(oID) references things(id) on delete cascade, value text );
create table thing_conditions ( id bigint primary key auto_increment, oID bigint, foreign key(oID) references things(id) on delete cascade, value text, `condition` text );
insert into things (id, name) values (1, 'A'), (2, 'B'), (3, 'C'), (4, 'D');
insert into thing_values (oID, value) values (1, 'aaa'), (1, 'bbb' ), (1, 'ccc' ), (2, 'ddd' ), (2, 'eee' ), (3, 'fff' ), (3, 'ggg' ), (3, 'hhh' ), (4, 'iii' );
insert into thing_conditions (oID, `condition`, value) values (1, 'color' , 'red'), (1, 'brightness' , '20'), (2, 'color' , 'green'), (2, 'brightness' , '50'), (2, 'saturation' , '100'), (3, 'color' , 'green'), (3, 'brightness' , '40'), (3, 'saturation' , '70'), (4, 'color' , 'purple');
select t.id, t.name, tv.value from thing_conditions tc left join thing_values tv on tv.oid = tc.oid left join things t on tc.oid = t.id where (tc.condition, tc.value) in (('color', 'green'), ('brightness', '50')) group by t.id, t.name, tv.value having count(*) = 2;
id
name
value
2
B
ddd
2
B
eee