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Can we use NOT and AND together in MongoDB?
Yes, we can use the NOT and AND together in MongoDB. The syntax is as follows
NOT X AND NOT Y = NOT (X AND Y) Let us see the working of above syntax. If both X and Y will be true then last result will be false. If one of the operands gives result false then last result will be true.
Following is the query to create a collection with documents
> db.NotAndDemo.insertOne({"StudentName":"John","StudentCountryName":"US"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c98746a330fd0aa0d2fe4a8")
}
> db.NotAndDemo.insertOne({"StudentName":"John","StudentCountryName":"UK"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c987478330fd0aa0d2fe4a9")
}
> db.NotAndDemo.insertOne({"StudentName":"David","StudentCountryName":"AUS"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c987487330fd0aa0d2fe4aa")
}
> db.NotAndDemo.insertOne({"StudentName":"Chris","StudentCountryName":"UK"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c9874ac330fd0aa0d2fe4ab")
}
> db.NotAndDemo.insertOne({"StudentName":"Chris","StudentCountryName":"US"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c9874b7330fd0aa0d2fe4ac")
}
Following is the query to display all the documents from a collection with the help of find() method
> db.NotAndDemo.find().pretty();
This will produce the following output:
{
"_id" : ObjectId("5c98746a330fd0aa0d2fe4a8"),
"StudentName" : "John",
"StudentCountryName" : "US"
}
{
"_id" : ObjectId("5c987478330fd0aa0d2fe4a9"),
"StudentName" : "John",
"StudentCountryName" : "UK"
}
{
"_id" : ObjectId("5c987487330fd0aa0d2fe4aa"),
"StudentName" : "David",
"StudentCountryName" : "AUS"
}
{
"_id" : ObjectId("5c9874ac330fd0aa0d2fe4ab"),
"StudentName" : "Chris",
"StudentCountryName" : "UK"
}
{
"_id" : ObjectId("5c9874b7330fd0aa0d2fe4ac"),
"StudentName" : "Chris",
"StudentCountryName" : "US"
}
Following is the query to use NOT and AND together, which is the same as NOT X OR NOT Y for NOT (X AND Y)
> db.NotAndDemo.find({
... "$or": [
... {"StudentName": {"$ne": "Chris"}},
... {"StudentCountryName": {"$ne": "US"}}
... ]
... }).pretty();
This will produce the following output
{
"_id" : ObjectId("5c98746a330fd0aa0d2fe4a8"),
"StudentName" : "John",
"StudentCountryName" : "US"
}
{
"_id" : ObjectId("5c987478330fd0aa0d2fe4a9"),
"StudentName" : "John",
"StudentCountryName" : "UK"
}
{
"_id" : ObjectId("5c987487330fd0aa0d2fe4aa"),
"StudentName" : "David",
"StudentCountryName" : "AUS"
}
{
"_id" : ObjectId("5c9874ac330fd0aa0d2fe4ab"),
"StudentName" : "Chris",
"StudentCountryName" : "UK"
}
Updated on: 2019-07-30T22:30:25+05:30
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