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SQL>
SQL> create table product(
2 product_id number(4) not null,
3 product_description varchar2(20) not null
4 );
Table created.
SQL>
SQL> insert into product values (1,'Java');
1 row created.
SQL> insert into product values (2,'Oracle');
1 row created.
SQL> insert into product values (3,'C#');
1 row created.
SQL> insert into product values (4,'Javascript');
1 row created.
SQL> insert into product values (5,'Python');
1 row created.
SQL>
SQL>
SQL> create table company(
2 product_id number(4) not null,
3 company_id NUMBER(8) not null,
4 company_short_name varchar2(30) not null,
5 company_long_name varchar2(60)
6 );
Table created.
SQL> insert into company values(1,1001,'A Inc.','Long Name A Inc.');
1 row created.
SQL> insert into company values(1,1002,'B Inc.','Long Name B Inc.');
1 row created.
SQL> insert into company values(1,1003,'C Inc.','Long Name C Inc.');
1 row created.
SQL> insert into company values(2,1004,'D Inc.','Long Name D Inc.');
1 row created.
SQL> insert into company values(2,1005,'E Inc.','Long Name E Inc.');
1 row created.
SQL> insert into company values(2,1006,'F Inc.','Long Name F Inc.');
1 row created.
SQL>
SQL>
SQL> create table org_company_site(
2 company_id number(8) not null,
3 site_no number(4) not null
4 );
Table created.
SQL> insert into org_company_site values (1001,1);
1 row created.
SQL> insert into org_company_site values (1002,2);
1 row created.
SQL> insert into org_company_site values (1003,3);
1 row created.
SQL> insert into org_company_site values (1004,1);
1 row created.
SQL> insert into org_company_site values (1004,2);
1 row created.
SQL> insert into org_company_site values (1004,3);
1 row created.
SQL> insert into org_company_site values (1005,1);
1 row created.
SQL> insert into org_company_site values (1005,4);
1 row created.
SQL> insert into org_company_site values (1005,5);
1 row created.
SQL> insert into org_company_site values (1006,1);
1 row created.
SQL>
SQL>
SQL> CREATE OR REPLACE FUNCTION f_cursor(p_cursor SYS_REFCURSOR)
2 RETURN NUMBER
3 IS
4 v_company_short_name VARCHAR2(30);
5 v_cnt NUMBER :=0;
6 v_ret_code NUMBER;
7 BEGIN
8 BEGIN
9 LOOP
10 FETCH p_cursor INTO v_company_short_name;
11 EXIT WHEN p_cursor%NOTFOUND;
12 v_cnt :=v_cnt +1;
13 END LOOP;
14 IF (v_cnt >0)THEN
15 v_ret_code :=1;
16 ELSE
17 v_ret_code :=0;
18 END IF;
19 EXCEPTION WHEN OTHERS THEN
20 v_ret_code :=SQLCODE;
21 END;
22 RETURN (v_ret_code);
23 END;
24 /
Function created.
SQL>
SQL>
SQL>
SQL> SELECT rpad(h.product_description,20,' ') "Hierarchy",
2 rpad(o.company_short_name,30,' ') "Organization"
3 FROM product h,company o
4 WHERE h.product_id =o.product_id
5 AND f_cursor(
6 CURSOR(SELECT o1.company_short_name
7 FROM company o1
8 WHERE o1.company_id =o.company_id
9 AND 1 < (SELECT count(os.site_no)
10 FROM org_company_site os
11 WHERE os.company_id =o1.company_id)
12 )
13 )=1;
Hierarchy Organization
-------------------- ------------------------------
Oracle D Inc.
Oracle E Inc.
2 rows selected.
SQL>
SQL>
SQL> drop table company;
Table dropped.
SQL>
SQL> drop table product;
Table dropped.
SQL>
SQL> drop table org_company_site;
Table dropped.
SQL>
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