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CREATE TABLE Orders ( ID, Name ) AS select 1, 'Order 1' from dual union all select 2, 'Order 2' from dual;
2 rows affected
CREATE TABLE Products (Id, Name) AS select 200, 'apple' from dual union all select 201, 'orange' from dual union all select 202, 'car' from dual union all select 203, 'airplane' from dual;
4 rows affected
CREATE TABLE OrderDetails (Order_Id, Product_Id) as select 1, 202 from dual union all select 2, 201 from dual union all select 2, 202 from dual union all select 2, 203 from dual;
4 rows affected
CREATE TYPE product_type AS OBJECT( id NUMBER, name VARCHAR2(200) ); /
CREATE TYPE product_table AS TABLE OF product_type; /
SELECT id AS Order_Id, CAST( MULTISET ( SELECT product_type( P.id, P.name ) FROM OrderDetails OD JOIN Products P ON OD.Product_Id = P.Id WHERE OD.Order_Id = O.Id ) AS product_table ) AS products FROM Orders O;