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How to solve [MongoError: connect ECONNREFUSED]
Hello Readers, I came across a solution while w
by saroj.singh
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MongoDB : $exist and $type operator
MongoDB - $exist and $type operator
$type operator : It matches values based on their BSON type.
e.g. We want to fetch documents from the collection which contains the value of "city" is only null.
db.collection.find( { "city" : { $typ...