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How to query MongoDB using the $ne operator?
To query MongoDB using the $ne operator, following is the syntax −
db.yourCollectionName.find({yourFieldName:{$ne:yourValue}}).pretty();Let us create a collection with documents −
> db.notEqaulToDemo.insertOne({"StudentName":"Larry","StudentMathMarks":68});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cbd3a6bde8cc557214c0ded")
}
> db.notEqaulToDemo.insertOne({"StudentName":"Chris","StudentMathMarks":88});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cbd3a79de8cc557214c0dee")
}
> db.notEqaulToDemo.insertOne({"StudentName":"David","StudentMathMarks":45});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cbd3a89de8cc557214c0def")
}
> db.notEqaulToDemo.insertOne({"StudentName":"Carol","StudentMathMarks":69});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cbd3a97de8cc557214c0df0")
}Display all documents from a collection with the help of find() method −
> db.notEqaulToDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cbd3a6bde8cc557214c0ded"),
"StudentName" : "Larry",
"StudentMathMarks" : 68
}
{
"_id" : ObjectId("5cbd3a79de8cc557214c0dee"),
"StudentName" : "Chris",
"StudentMathMarks" : 88
}
{
"_id" : ObjectId("5cbd3a89de8cc557214c0def"),
"StudentName" : "David",
"StudentMathMarks" : 45
}
{
"_id" : ObjectId("5cbd3a97de8cc557214c0df0"),
"StudentName" : "Carol",
"StudentMathMarks" : 69
}Following is the query for MongoDB $ne operator −
> db.notEqaulToDemo.find({StudentMathMarks:{$ne:88}}).pretty();This will produce the following output −
{
"_id" : ObjectId("5cbd3a6bde8cc557214c0ded"),
"StudentName" : "Larry",
"StudentMathMarks" : 68
}
{
"_id" : ObjectId("5cbd3a89de8cc557214c0def"),
"StudentName" : "David",
"StudentMathMarks" : 45
}
{
"_id" : ObjectId("5cbd3a97de8cc557214c0df0"),
"StudentName" : "Carol",
"StudentMathMarks" : 69
}
Updated on: 30-Jul-2019
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