Skip to content
Related Articles

Related Articles

Indexing in MongoDB using Python
  • Last Updated : 10 Jul, 2020
GeeksforGeeks - Summer Carnival Banner

By creating indexes in a MongoDB collection, query performance is enhanced because they store the information in such a manner that traversing it becomes easier and efficient. There is no need for a full scan as MongoDB can search the query through indexes. Thus it restricts the number of documents that need to be checked for query criteria. 
 

Syntax– create_index([str1, direction], [str1, direction]……., optional)  

Parameters are: 
 

  • str : string used for naming index, it can be one or more than one
  • direction : can be one or many directions, it has to be one of these directions- descending, ascending, hashed, geosphere, geohaystack, geo2d or text

Example 1:



Python3




from pymongo import MongoClient
# Create a pymongo client 
client = MongoClient('localhost', 27017
    
# database instance 
db = client['GFG'
    
# collection instance 
doc = db['Student'
  
# Creating a single field index
res = doc.create_index("index_created")
print(res)

Output: 
 

index_created_1

Example 2:

Python3




from pymongo import MongoClient
# Create a pymongo client 
client = MongoClient('localhost', 27017
    
# database instance 
db = client['GFG'
    
# collection instance 
doc = db['Student'
  
# Creating a single field index in descending order
res = doc.create_index([ ("index_descending", -1) ])
print(res)

Output:

index_descending_-1

Example 3:

Python3




from pymongo import MongoClient,, ASCENDING, DESCENDING 
# Create a pymongo client 
client = MongoClient('localhost', 27017
    
# database instance 
db = client['GFG'
    
# collection instance 
doc = db['Student'
  
# Creating a compund field index in descending order
res = doc.create_index(
[
("ascending_index", 1),
("second_descnding_indexed", DESCENDING)
]
)
print(res)

Output:

ascending_index_1
second_descnding_indexed_DESCENDING

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.

My Personal Notes arrow_drop_up
Recommended Articles
Page :