MONGODB Tutorial

⚡ MongoDB Indexing

Indexes in MongoDB are used to improve the performance of search queries. Without indexes, MongoDB must scan every document in a collection to find matches.

🔹 Creating a Single Field Index

This creates an index on a specific field.

db.users.createIndex({ name: 1 })   // 1 for ascending, -1 for descending
  

🔹 Creating a Compound Index

Indexes that cover multiple fields.

db.users.createIndex({ name: 1, age: -1 })
  

🔹 Viewing Indexes

Use this to list all indexes in a collection:

db.users.getIndexes()
  

🔹 Dropping an Index

Use this to remove a specific index:

db.users.dropIndex({ name: 1 })