SQL Oracle (using AND clause) - sql

Question

when I use below code, I get the data of customers who ordered "Planned" or 'obsolete' products, but I want to get data of the customers who ordered both type, changing 'or' to 'and' does not work... please help
SELECT DISTINCT customers.CUST_EMAIL
,ORDERS.ORDER_ID
,PRODUCT_INFORMATION.PRODUCT_NAME
,PRODUCT_INFORMATION.PRODUCT_STATUS
FROM PRODUCT_INFORMATION
INNER JOIN ORDER_ITEMS ON PRODUCT_INFORMATION.PRODUCT_ID = ORDER_ITEMS.PRODUCT_ID
INNER JOIN ORDERS ON ORDER_ITEMS.ORDER_ID = ORDERS.ORDER_ID
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMER_ID = ORDERS.CUSTOMER_ID
WHERE PRODUCT_INFORMATION.PRODUCT_STATUS = 'planned'
OR PRODUCT_INFORMATION.PRODUCT_STATUS = 'obsolete'
ORDER BY CUSTOMERS.CUST_EMAIL;

Answer 1

I'm guessing that you want the following. If you want to get correct answer, rather than guesses, please provide a good representative set of sample data and your expected result based on that sample data.
First part of the query returns Customers that ordered planned products, second part of the query returns Customers that ordered obsolete products. INTERSECT operator returns only those that have ordered both planned and obsolete products.
You don't need explicit DISTINCT any more, because INTERSECT would do it anyway.
I've removed PRODUCT_INFORMATION.PRODUCT_STATUS from the list of returned columns, because with it the result set would be always empty.
I removed ORDERS.ORDER_ID and PRODUCT_INFORMATION.PRODUCT_NAME from result as well. I don't know what should be the correct query, but it is likely that INTERSECT should be done just on CUSTOMER_ID and then, once you get the list of IDs, you can join other tables to it fetching other related details if needed.
The performance of this method is beyond the scope of the question.
SELECT
CUSTOMERS.CUSTOMER_ID
,customers.CUST_EMAIL
FROM
PRODUCT_INFORMATION
INNER JOIN ORDER_ITEMS ON PRODUCT_INFORMATION.PRODUCT_ID = ORDER_ITEMS.PRODUCT_ID
INNER JOIN ORDERS ON ORDER_ITEMS.ORDER_ID = ORDERS.ORDER_ID
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMER_ID = ORDERS.CUSTOMER_ID
WHERE PRODUCT_INFORMATION.PRODUCT_STATUS = 'planned'
INTERSECT
SELECT
CUSTOMERS.CUSTOMER_ID
,customers.CUST_EMAIL
FROM
PRODUCT_INFORMATION
INNER JOIN ORDER_ITEMS ON PRODUCT_INFORMATION.PRODUCT_ID = ORDER_ITEMS.PRODUCT_ID
INNER JOIN ORDERS ON ORDER_ITEMS.ORDER_ID = ORDERS.ORDER_ID
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMER_ID = ORDERS.CUSTOMER_ID
WHERE PRODUCT_INFORMATION.PRODUCT_STATUS = 'obsolete'
ORDER BY CUST_EMAIL

Answer 2

without the script for you tables it's difficult to build a test case and a working query; i'll try with this step:
select order_id from (
SELECT customers.CUSTOMER_ID
,sum(decode(PRODUCT_INFORMATION.PRODUCT_STATUS, 'obsolete', 1, 0)) obsolete
,sum(decode(PRODUCT_INFORMATION.PRODUCT_STATUS, 'planned', 1, 0)) planned
FROM PRODUCT_INFORMATION
INNER JOIN ORDER_ITEMS ON PRODUCT_INFORMATION.PRODUCT_ID = ORDER_ITEMS.PRODUCT_ID
INNER JOIN ORDERS ON ORDER_ITEMS.ORDER_ID = ORDERS.ORDER_ID
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMER_ID = ORDERS.CUSTOMER_ID
WHERE PRODUCT_INFORMATION.PRODUCT_STATUS = 'planned'
OR PRODUCT_INFORMATION.PRODUCT_STATUS = 'obsolete'
group by customers.CUSTOMER_ID)
where obsolete>1 and planned>1
This query should return all the customer id that have items in orders with both the product status (the different product status may be in different orders), if you want to retrieve orders that have products with both status you must change the query removing customer.customer_id and adding orders.order_id. If you provide some script with sample data we can provide a better answer