MongoDB query to find documents having two values in an array conforming to multiple criteria?

For this, use $elemMatch operator. Let us first create a collection with documents −

> db.findDocumentsHaving2Demo.insertOne(
   {_id : 101, Values: [78,98]}
);
{ "acknowledged" : true, "insertedId" : 101 }
> db.findDocumentsHaving2Demo.insertOne(
   {_id :102, Values : [89,102]}
);
{ "acknowledged" : true, "insertedId" : 102 }

Following is the query to display all documents from a collection with the help of find() method −

> db.findDocumentsHaving2Demo.find().pretty();

This will produce the following output −

{ "_id" : 101, "Values" : [ 78, 98 ] }
{ "_id" : 102, "Values" : [ 89, 102 ] }

Following is the query to find documents having two values in Array conforming to multiple criteria −

> db.findDocumentsHaving2Demo.find({$and: [
   {Values: {$elemMatch: {$gte: 77, $lte: 78}}},
   {Values: {$elemMatch: {$gte:90 , $lte: 110}}},
   {'Values.2': {$exists: false}}
]});

This will produce the following output −

{ "_id" : 101, "Values" : [ 78, 98 ] }

Smita Kapse

Published on 14-Jun-2019 12:04:37

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