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Developer-C 11.1
3.0
4.0
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10
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3.27
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AdventureWorks
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CREATE table classes( id int primary key );
CREATE table courses( id int primary key, name varchar(50), active bool, class_id int, FOREIGN KEY(class_id) REFERENCES classes(id) );
CREATE table students ( id int primary key, class_id int, FOREIGN KEY(class_id) REFERENCES classes(id) );
INSERT INTO classes VALUES(1),(2),(3);
INSERT INTO students VALUES (1,1), (2,1), (3,2), (4,2), (5,2), (6,3), (7,3), (8,3), (9,3);
INSERT INTO courses VALUES (1,'foo',false,1), (2,'bar',true,1), (3,'blabla',false,1), (4,'foo',false,2), (5,'blabla',true,2), (6,'etc',true,3);
select stu.id from students stu inner join classes clz ON clz.id = stu.class_id inner join courses cour ON cour.class_id = clz.id where cour.active = true and cour.name in ('foo', 'bar', 'etc');
id
1
2
6
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9