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create table orders ( id int primary key, amount int ); create table order_items ( id int primary key, order_id int, item_id int, amount int, foreign key (order_id) references orders(id) on delete cascade ); insert into orders values (1, 100); insert into order_items values (1, 1, 5, 3), (2, 1, 6, 4); select * from order_items; delete from orders where id = 1; select * from order_items;
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