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Anil  Bist / Professional / DataBase

 
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Lesson Topics's No:-  First|1 | 2 | 3|Last
Lessons:-Index Creation Basics

The createdCollectionAutomatically indicates if the operation created a collection. If a collection does not exist, MongoDB creates the collection as part of the indexing

operation.Let run  db.transactions.getIndexes(); again.           [                                                                                                                                                                                   

 

Now you see transactions collection have two indices. Default _id index and cr_dr_1 which we created. The name is assigned by MongoDB. You can set your own name like below.

db . transactions.createIndex ( { cr_dr : -1 },{ name :  "index on cr_dr desc" } )

 

Now  db.transactions.getIndexes();  will give you three indices. 

 
 
 
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Anil  Bist

Skills    Mongodb

Qualifications :- High School - SLV, College/University - Graphic Era Deemed Univ University,
Location :-Dehradun,Dehradun,Uttarakhand,India
Description:-

I started my Professional Journey in 2006 with one of the Web Development Company in Bangalore and my 1st framework was "Ruby on Rail" as Web development and delivered around 5+ Projects using this platform. Then came another dimension as JEE/Sturst framework, Gradually I realized that I want to build something on my own and give my passion and energy on creating something different a
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