Find all documents against array fields which matches any of the input Suppose, I have a collection "StockUsers" like this. { "user":"kiran", "stocksPurchased":["hdfc","sbi","icici"] } { "user":"vanaja", "stocksPurchased":["hdfc","idbi","pnb"] } { "user":"karthika", "stocksPurchased":["idfc","idbi"] } { "user":"venkat", "stocksPurchased":["citi"] } Now, If i want to query the users who purchased any of the given stocks. Ex: Retrieve all users who purchased idfc or pnb Query: db.StockUsers.aggregate([ { "$match": { "stocksPurchased": {"$elemMatch":{"$in":["idfc","pnb"]}} } } ]) Response: { "user":"vanaja...