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Write an equality in MongoDB without using $eq operator
Let us first create a collection with documents -
> db.operatorDemo.insertOne({"StudentSubject":["MongoDB","MySQL","Java"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cef94eaef71edecf6a1f6a2")
}
> db.operatorDemo.insertOne({"StudentSubject":["Java","C","C++"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cef94faef71edecf6a1f6a3")
}Display all documents from a collection with the help of find() method -
> db.operatorDemo.find().pretty();
Output
{
"_id" : ObjectId("5cef94eaef71edecf6a1f6a2"),
"StudentSubject" : [
"MongoDB",
"MySQL",
"Java"
]
}
{
"_id" : ObjectId("5cef94faef71edecf6a1f6a3"),
"StudentSubject" : [
"Java",
"C",
"C++"
]
}Following is the query for an equality without $eq operator:
> db.operatorDemo.find({StudentSubject:"MongoDB"});Output
{ "_id" : ObjectId("5cef94eaef71edecf6a1f6a2"), "StudentSubject" : [ "MongoDB", "MySQL", "Java" ] }
Updated on: 30-Jul-2019
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