Find document with array that contains a specific value in MongoDB

MongoDBDatabaseBig Data Analytics

You can use find() method to find document with array that contains a specific value. The syntax is as follows:

db.yourCollectionName.find({"yourArrayFieldName":"yourValue"},.......N).pretty();

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

>db.findSpecificValue.insertOne({"StudentId":1,"StudentName":"Larry","FavouriteSubject":["C","C++","Java"]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c6e8996140577d89182b8d0")
}
>db.findSpecificValue.insertOne({"StudentId":2,"StudentName":"Larry","FavouriteSubject":["MongoDB","MySQL","SQL Server"]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c6e89b1140577d89182b8d1")
}

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

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

The following is the output:

{
   "_id" : ObjectId("5c6e8996140577d89182b8d0"),
   "StudentId" : 1,
   "StudentName" : "Larry",
   "FavouriteSubject" : [
      "C",
      "C++",
      "Java"
   ]
}
{
   "_id" : ObjectId("5c6e89b1140577d89182b8d1"),
   "StudentId" : 2,
   "StudentName" : "Larry",
   "FavouriteSubject" : [
      "MongoDB",
      "MySQL",
      "SQL Server"
   ]
}

Here is the query to find document with array that contains a specific value i.e. “MongoDB” for FavouriteSubject here:

> db.findSpecificValue.find({"FavouriteSubject":"MongoDB"}).pretty();

The following is the output:

{
   "_id" : ObjectId("5c6e89b1140577d89182b8d1"),
   "StudentId" : 2,
   "StudentName" : "Larry",
   "FavouriteSubject" : [
      "MongoDB",
      "MySQL",
      "SQL Server"
   ]
}
raja
Published on 18-Mar-2019 16:18:08
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