getting the time before the contact issue date SQL Query - sql

Question

I am comparing two time column in the my file.
What I need to do is to compare the timestamp from order_status table and compare it to the contact table - contact_time.
From the contact table, i need to be able to get the timestamp before the contact_time for each order_id.
Sample:
Order_ID Contact_Time
1 12/24/2019 12:25:00 AM
The query should show:
Order_ID Order_Status_ID Status_Description
1 3 desc3
Since based from the contact_time, the last timestamp for
order 1 is: 12/24/2019 12:10:00 AM
I only need to show the order_ID, order_status_ID and status_description.
here are the three table:
SELECT
ORDER_ID,
ORDER_STATUS_ID
FROM ORDER_STATUS
INNER JOIN META_STATUS ON ORDER_STATUS.ORDER_STATUS_ID = META_STATUS.META_STATUS_ID
INNER JOIN (
SELECT ORDER_STATUS.ORDER_ID, MAX(ORDER_STATUS.TIMESTAMP) MAX_TIME FROM ORDER_STATUS INNER JOIN CONTACT
ON ORDER_STATUS.ORDER_ID = CONTACT.ORDER_ID
WHERE CONTACT.CONTACT_TIME > ORDER_STATUS.TIMESTAMP) X
on x.ORDER_ID = ORDER_STATUS.ORDER_ID and ORDER_STATUS.TIMESTAMP = x.MAX_TIME
Hope someone can help me fix my code.
Thanks!

Answer 1

Try this:
WITH
a AS (
SELECT
os.Order_ID,
os.order_status_id AS Order_Status_ID,
ms.status_description AS Status_Description,
os.[Timestamp],
c.Contact_time,
ROW_NUMBER() OVER(
PARTITION BY os.Order_ID
ORDER BY [Timestamp] DESC
) AS rn
FROM Contact AS c
JOIN Order_Status AS os
ON c.Order_id = os.Order_ID AND
c.Contact_time >= os.[Timestamp]
LEFT JOIN meta_status AS ms
ON os.order_status_id = ms.order_status_id
)
SELECT *
FROM a
WHERE rn = 1;
Result:
+----------+-----------------+--------------------+-------------------------+-------------------------+----+
| Order_ID | Order_Status_ID | Status_Description | Timestamp | Contact_time | rn |
+----------+-----------------+--------------------+-------------------------+-------------------------+----+
| 1 | 3 | desc3 | 2019-12-24 00:10:00.000 | 2019-12-24 00:25:00.000 | 1 |
| 2 | 9 | | 2019-12-24 15:10:00.000 | 2019-12-24 15:30:00.000 | 1 |
| 4 | 3 | desc3 | 2019-12-24 19:32:00.000 | 2019-12-24 19:38:00.000 | 1 |
| 5 | 2 | desc2 | 2019-01-28 19:30:00.000 | 2019-01-28 19:46:00.000 | 1 |
+----------+-----------------+--------------------+-------------------------+-------------------------+----+
db-fiddle

Answer 2

Try this:
SELECT os.ORDER_ID
,os.ORDER_STATUS_ID,
,ms.STATUS_DESCRIPTION
FROM ORDER_STATUS AS os
INNER JOIN META_STATUS AS ms
ON os.ORDER_STATUS_ID = ms.META_STATUS_ID
INNER JOIN (
SELECT os.ORDER_ID
,MAX(os.TIMESTAMP) MAX_TIME
FROM ORDER_STATUS AS os
INNER JOIN CONTACT AS c
ON os.ORDER_ID = c.ORDER_ID
WHERE c.CONTACT_TIME > os.TIMESTAMP) x
ON x.ORDER_ID = os.ORDER_ID
AND os.TIMESTAMP = x.MAX_TIME