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Common Pattern : If there is a high amount of withdrawal occurred for a ATM card which contains the less amount of withdrawal for a day, then it can be a possible fraud situation. To identify these types of scenario we need to use the "pattern" structure which provided by siddhi.
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Query from every a1 = withdrawalStream[amount < 1000] -> b1 = withdrawalStream[amount > 50000 and a1.cardNO == a2.cardNO] within 1day |
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Here, we are checking whether there is a high amount withdrawal ( > 50000) happened in a day where there is a less amount ( < 1000) withdrawal occurred for the same ATM card.