How to combine records using SQL?

Question

If I have the following data:
Table A
order_no company_code
O001 C001
Table B
order_no po_no
O001 P001
O001 P002
O001 P003
Now, I want to combine the data as:
View A
order_no company_code po_no
O001 C001 P001, P002, P003
If can it be realized using SQL?
Thanks and Best Regards,
Su Qian

Answer 1

Hi Su Qian,
To get the result like this you should write a function and call that in the select query.
The function could be like this:
CREATE OR REPLACE FUNCTION TEST(p_order_no IN B.order_no%TYPE ) RETURN VARCHAR2 IS
v_po_no VARCHAR2(100);
BEGIN
FOR c IN (SELECT po_no FROM B WHERE order_no = p_order_no)
LOOP
IF v_po_no IS NULL THEN
v_po_no := c.po_no;
ELSE
v_po_no := v_po_no||','||c.po_no;
END IF;
END LOOP;
RETURN v_po_no;
END;
Now you issue the query like this:
select order_no, company_code, test(order_no) po_no from a;
This will return you what you want.
Hope this will help you.
Best Regards,
Ramesh Rathi.
OCP - DBA.
Zensar Tech Ltd.
[email protected]
If I have the following data:
Table A
order_no company_code
O001 C001
Table B
order_no po_no
O001 P001
O001 P002
O001 P003
Now, I want to combine the data as:
View A
order_no company_code po_no
O001 C001 P001, P002, P003
If can it be realized using SQL?
Thanks and Best Regards,
Su Qian