SQL query to fetch repeat column values within time frame - sql-server

Question

I have an eCommerce website where I am getting lot of fraud orders.. I'd like to pull out those Order_No.
Here is my query
SELECT
O.Order_No, O.Customer_ID, O.DateOrdered, O.IPAddress,
C.FirstName, C.LastName, CD.nameoncard
FROM
Order_No O
INNER JOIN
CardData CD ON O.card_id = CD.id
INNER JOIN
Customers C ON O.customer_id = C.customer_id
ORDER BY
O.order_no desc
Here's the criteria I want to follow:
If the customer_id repeats more than once in 6hrs
If the IPAddress repeats more than once in 6hrs
If the Lastname is NOT found in Nameoncard
Can someone help please?

Answer 1

can you try this
WITH Tmp (Order_No, Customer_id, DateOrdered, IPAddress, FirstName, LastName, NameOnCard)
AS
(
SELECT Ord.Order_No, Ord.Customer_Id, Ord.DateOrdered, Ord.IPAddress,
Cust.FirstName, Cust.LastName, CustData.NameOnCard
FROM Order_No Ord
INNER JOIN Customers Cust
ON
Cust.Customer_Id = Ord.Customer_Id
INNER JOIN
CardData CustData
ON CustData.Id = Ord.Card_Id
)
SELECT DISTINCT a.*
FROM Tmp a
INNER JOIN Tmp b
ON a.Order_No <> b.Order_No
AND a.Customer_Id = b.Customer_Id
WHERE DATEDIFF(hour, a.DateOrdered, b.DateOrdered) >= 6
UNION
SELECT DISTINCT c.*
FROM Tmp c
INNER JOIN Tmp d
ON c.Order_No <> d.Order_No
AND c.IPAddress = d.IPAddress
WHERE DATEDIFF(hour, c.DateOrdered, d.DateOrdered) >= 6
UNION
SELECT DISTINCT e.*
FROM Tmp e
WHERE ISNULL(e.NameOnCard,'') = ''

Answer 2

here is the query:
select * from
(
select b.order_no,b.dateordered,a.customer_id, C.FirstName, C.LastName, cd.nameoncard from order_no as a
left join order_no as b on a.customer_id=b.customer_id
inner join carddata as cd on b.customer_id=cd.customer_id
INNER JOIN Customers C ON b.customer_id = C.customer_id
where a.order_no < b.order_no
and datediff(hour,a.dateordered,b.dateordered) between 0 and 6
union
select b.order_no,b.dateordered,a.customer_id, C.FirstName, C.LastName, cd.nameoncard from order_no as a
left join order_no as b on a.IPAddress=b.IPAddress
inner join carddata as cd on b.customer_id=cd.customer_id
INNER JOIN Customers C ON b.customer_id = C.customer_id
where a.order_no < b.order_no
and datediff(hour,a.dateordered,b.dateordered) between 0 and 6
union
select a.order_no,a.dateordered,a.customer_id, C.FirstName, C.LastName, cd.nameoncard from order_no as a
inner join carddata as cd on a.customer_id=cd.customer_id
INNER JOIN Customers C ON a.customer_id = C.customer_id
where charindex(C.LastName,cd.nameoncard) = 0
) as abc