通常、同じテーブルに自己結合し、「重複」条件を結合条件に入れます。
例
SELECT
*
FROM
Transactions t1
inner join
Transactions t2
on
t1.Terminal = t2.Terminal and
t1.Amount = t2.Amount and
DATEDIFF(minute,t2.TransactionDate,t1.TransactionDate) between 0 and 10 and
t1.TransactionID > t2.TransactionID /* prevent matching the same row */