MongoDB Query
- MongoDB Query allows retrieving data from the MongoDB database. MongoDB Query provides simplicity in the process of fetching data from the database, it’s similar to SQL queries in SQL Database language.
- While performing a query operation, one can also use criteria or conditions that can be used to retrieve specific data from the database.
- MongoDB provides the function names as db.collection_name.find() to operate query operations on the database.
Set Up an Environment:
To understand MongoDB Query we need a collection called articles on which we will perform various operations and queries. Below are the sample documents which we will use in the article.
[
{
"_id": ObjectId("6009585d35cce6b7b8f087f1"),
"title": "Math",
"author": "Aditya",
"level": "basic",
"length": 230,
"example": 11
},
{
"_id": ObjectId("60095b8a3fc110f90873ce29"),
"title": "Array",
"author": "Aditya",
"level": "basic",
"length": 200,
"example": 5
},
{
"_id": ObjectId("60095b8a3fc110f90873ce2a"),
"title": "Stack",
"author": "Rakesh",
"level": "easy",
"length": 400,
"example": 10
},
{
"_id": ObjectId("60095b8a3fc110f90873ce2b"),
"title": "Queue",
"author": "Rakesh",
"level": "medium",
"length": 350,
"example": 2
},
{
"_id": ObjectId("60095b8a3fc110f90873ce2c"),
"title": "Tree",
"author": "devil",
"level": "high",
"length": 1000,
"example": 10
},
{
"_id": ObjectId("60095b8a3fc110f90873ce2d"),
"title": "Graph",
"author": "Aditya",
"level": "high",
"length": 1500,
"example": 15
},
{
"_id": ObjectId("60095b8d3fc110f90873ce2e"),
"title": "Segment Tree",
"author": "devil",
"level": "very high",
"length": 500,
"example": 20
},
{
"_id": ObjectId("60095fd4e5a7731b2a55a922"),
"title": "Trie",
"author": "Rakesh",
"length": 500,
"example": 20,
"time": 50
}
]
What is a MongoDB Query?
MongoDB Query is a fundamental aspect of MongoDB that allows users to fetch data from the database. Similar to SQL queries in traditional databases, MongoDB queries provide simplicity and flexibility in retrieving specific data based on certain criteria or conditions.
In this article, We will learn about the MongoDB Query in detail by performing various Queries on document of MongoDB collection and so on.
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