How to query on list field in MongoDB?

MongoDBDatabaseBig Data Analytics

To understand the query on list field, and/or, you can create a collection with documents.

The query to create a collection with a document is as follows −

> db.andOrDemo.insertOne({"StudentName":"Larry","StudentScore":[33,40,50,60,70]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c9522d316f542d757e2b444")
}
> db.andOrDemo.insertOne({"StudentName":"Larry","StudentScore":[87,67,79,98,90]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c95230916f542d757e2b445")
}

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

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

The following is the output −

{
   "_id" : ObjectId("5c9522d316f542d757e2b444"),
   "StudentName" : "Larry",
   "StudentScore" : [
      33,
      40,
      50,
      60,
      70
   ]
}
{
   "_id" : ObjectId("5c95230916f542d757e2b445"),
   "StudentName" : "Larry",
   "StudentScore" : [
      87,
      67,
      79,
      98,
      90
   ]
}

Here is the query on list field.

The query is as follows −

> db.andOrDemo.find({"StudentScore":70}).pretty();

The following is the output:

{
   "_id" : ObjectId("5c9522d316f542d757e2b444"),
   "StudentName" : "Larry",
   "StudentScore" : [
      33,
      40,
      50,
      60,
      70
   ]
}

Case 3 − Here is the query for or list field.

The query is as follows −

> db.andOrDemo.find({"$or":[ {"StudentScore":60}, {"StudentScore":90}]}).pretty();

Sample Output −

{
   "_id" : ObjectId("5c9522d316f542d757e2b444"),
   "StudentName" : "Larry",
   "StudentScore" : [
      33,
      40,
      50,
      60,
      70
   ]
}
{
   "_id" : ObjectId("5c95230916f542d757e2b445"),
   "StudentName" : "Larry",
   "StudentScore" : [
      87,
      67,
      79,
      98,
      90
   ]
}
raja
Published on 01-Apr-2019 12:21:08
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