Database
[{"fullname":"I'm Admin","password":"$2b$10$MNsk4ODki0bdSpliKthdb.0KGvy4xkBxxeadfg2TnQAZf810SQ.3q","mobile":"88888888","email":"admin@gmail.com","accountBalance":979000,"__v":0,"tradeTransactions":[{"transactionId":"2021-11-02T00:55:52.268Z","itemName":"banana","purchasePrice":1,"purchaseAmount":8000},{"transactionId":123,"itemName":"apple","purchasePrice":2,"purchaseAmount":5000}]}]
Query
db.collection.aggregate([{"$project":{_id:0,tradeTransactions:{"$filter":{"input":"$tradeTransactions","as":"t","cond":{$eq:["$$t.transactionId","2021-11-02T00:55:52.268Z"]}}}}}])