# Find a document with ObjectID in MongoDB?

MongoDBDatabaseBig Data Analytics

To find a document with Objectid in MongoDB, use the following syntax −

db.yourCollectionName.find({"_id":ObjectId("yourObjectIdValue")}).pretty();

To understand the above syntax, let us create a collection with the document. The query to create a collection with a document is as follows −

> db.findDocumentWithObjectIdDemo.insertOne({"UserName":"Larry"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c90e4384afe5c1d2279d69b")
}
{
"acknowledged" : true,
"insertedId" : ObjectId("5c90e4444afe5c1d2279d69c")
}

{
"acknowledged" : true,
"insertedId" : ObjectId("5c90e4704afe5c1d2279d69d")
}

Display all documents from a collection with the help of find() method. The query is as follows −

> db.findDocumentWithObjectIdDemo.find().pretty();

The following is the output −

{ "_id" : ObjectId("5c90e4384afe5c1d2279d69b"), "UserName" : "Larry" }
{
"_id" : ObjectId("5c90e4444afe5c1d2279d69c"),
"UserAge" : 23
}
{
"_id" : ObjectId("5c90e4704afe5c1d2279d69d"),
"UserAge" : 26,
"UserHobby" : [
"Learning",
"Photography"
]
}

Case 1 − Here is the query to find a document with ObjectId in MongoDB.

> db.findDocumentWithObjectIdDemo.find({"_id":ObjectId("5c90e4704afe5c1d2279d69d")}).pretty();

The following is the output −

{
"_id" : ObjectId("5c90e4704afe5c1d2279d69d"),
"UserAge" : 26,
"UserHobby" : [
"Learning",
"Photography"
]
}

Case 2 − Here is the query to find another document with ObjectId in MongoDB.

The query is as follows −

> db.findDocumentWithObjectIdDemo.find({"_id": ObjectId("5c90e4444afe5c1d2279d69c")}).pretty();

The following is the output −

{
"_id" : ObjectId("5c90e4444afe5c1d2279d69c"),
}