Types of Indexes
MongoDB supports various types of indexes, including
- Single Field Index: It Indexes a single field in a collection.
- Compound Index: It Indexes multiple fields together as a compound key.
- Multikey Index: It Indexes the elements of an array field.
- Text Index: It Supports text search operations on string content.
- Geospatial Index: It Indexes geographic data for efficient location-based queries.
- Hashed Index: It Hashes the indexed field value to support hash-based equality queries.
Let’s set up an Environment:
To understand Single Field Indexes In MongoDB we need a collection and some documents on which we will perform various operations and queries. Here we will consider a collection called books which contains information in various documents are shown below.
([
{
"title": "MongoDB Basics",
"author": "John Doe",
"publishedYear": 2021
},
{
"title": "Advanced MongoDB Techniques",
"author": "Jane Smith",
"publishedYear": 2020
},
{
"title": "Mastering MongoDB",
"author": "Alice Johnson",
"publishedYear": 2019
}
]);
Single Field Indexes In MongoDB
In MongoDB, indexes play a crucial role in improving query performance by efficiently locating and retrieving documents from collections. One type of index commonly used is the single-field index, which indexes a single field within a collection.
In this article, we will learn about the concept of single field indexes in MongoDB by explaining their importance, and usage and providing practical examples with outputs.