We can use insert() or save() methods to insert document(data)
in collection MongoDB.
Syntax
Basic syntax of insert() command is as follows:
>db.COLLECTION_NAME.insert(document)
|
Example
>db.mycol.insert({
_id: ObjectId(7df78ad8902c),
title: 'MongoDB Overview',
description: 'MongoDB is no
sql database',
by: 'Codefari',
url: 'http://www.codefari.com',
tags: ['mongodb',
'database', 'NoSQL'],
likes: 100
})
|
mycol is a collection name, MongoDB will create collection if doesn't
exist in the database then insert the document into it. to know how to create a collection click here.
if we did not specify the _id parameter, MongoDB assigns a
unique Object_Id for this document. _id is 12 bytes hexadecimal number unique
for every document in a collection. 12 bytes are divided as follows:
_id: ObjectId(4 bytes timestamp, 3 bytes machine id, 2 bytes process id, 3 bytes incrementer) |
If we want to insert multiple documents in a single query,
then we will be passed an array of the document in insert() command.
Example
>db.post.insert([
{
title: 'MongoDB Overview',
description: 'MongoDB is no
sql database',
by: 'Codefari',
url: 'http://www.codefari.com',
tags: ['mongodb',
'database', 'NoSQL'],
likes: 100
},
{
title: 'NoSQL Database',
description: 'NoSQL database
doesn't have tables',
by: 'Codefari',
url: 'http://www.codefari.com',
tags: ['mongodb',
'database', 'NoSQL'],
likes: 20,
comments: [
{
user:'user1',
message: 'My first
comment',
dateCreated: new
Date(2013,11,10,2,35),
like: 0
}
]
}
])
|
we can use this way also
to insert the document use db.post.save(document). Save () method will work the same as the insert() method when we did not specify_id in the document. When we
have specified _id then it will replace whole data of document containing _id as
specified in save() method.
Good one Dilip...keep it up !
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