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How to convert date to timestamp in MongoDB
To convert date to timestamp in MongoDB, use aggregate(). Let us create a collection with documents −
> db.demo93.insertOne({"UserName":"Chris","ArrivalDate":new ISODate("2020-10-01")});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2d4b6479799acab037af68")
}
> db.demo93.insertOne({"UserName":"David","ArrivalDate":new ISODate("2019-12-31")});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2d4b7379799acab037af69")
}Display all documents from a collection with the help of find() method −
> db.demo93.find();
This will produce the following output −
{ "_id" : ObjectId("5e2d4b6479799acab037af68"), "UserName" : "Chris", "ArrivalDate" : ISODate("2020-10-01T00:00:00Z") }
{ "_id" : ObjectId("5e2d4b7379799acab037af69"), "UserName" : "David", "ArrivalDate" : ISODate("2019-12-31T00:00:00Z") }Following is the query to convert date to timestamp in MongoDB −
> db.demo93.aggregate([
... { "$match": { "UserName": "Chris" }},
... { "$addFields": {
... "timestamp": { "$toLong": "$ArrivalDate" }
... }}
... ]);This will produce the following output −
{ "_id" : ObjectId("5e2d4b6479799acab037af68"), "UserName" : "Chris", "ArrivalDate" : ISODate("2020-10-01T00:00:00Z"), "timestamp" : NumberLong("1601510400000") }
Updated on: 30-Mar-2020
2K+ Views
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