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Anil  Bist / Professional / DataBase

 
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Question  Tutor Notes
 
Lesson Topics's No:-  ||
Lessons:-Update

Update

Update the entire object:

 

Or just update a single field of a document. In this case age:

db.people.update ({name: 'Tom' }, {$set: {age: 29 } } )

 

You can also update multiple documents simultaneously by adding a third parameter. This query will update all documents where the name equals Tom:  

 

If a new field is coming for update, that field will be added to the document.

db.people.updateMany({name: 'Tom' },{$set:{age: 30, salary: 50000 } })// Document will have `salary` field as well.

 

If a document is needed to be replaced,

db.collection.replaceOne ( { name:'Tom' }, {name: 'Lakmal' ,age: 25 ,address: 'Sri Lanka' })  

 

can be used.

Note: Fields you use to identify the object will be saved in the updated document. Field that are not defined in the update section will be removed from the document.  

 
 
 
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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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