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yaswanthteja
yaswanthteja

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MongoDb Row commands

#mongodb #beginners #programming #tutorial

In this post, we will see a comprehensive list of all the MongoDB Row commands you will ever need as a MongoDB beginner.

Row(Document) Commands

  • Show all Rows in a Collection 
db.comments.find()
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  • Show all Rows in a Collection (Prettified) 
db.comments.find().pretty()
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  • Find the first row matching the object 
db.comments.findOne({name: 'yash'})
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  • Insert One Row 
db.comments.insert({
    'name': 'yash',
    'lang': 'JavaScript',
    'meme': 1
 })
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  • Insert many Rows 
db.comments.insertMany([{
    'name': 'yash',
    'lang': 'JavaScript',
    'meme': 1
    }, 
    {'name': 'Rohan',
    'lang': 'Python',
    'meme': 3
    },
    {'name': 'jagu',
    'lang': 'Java',
    'meme': 4
}])
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  • Search in a MongoDb Database 
db.comments.find({lang:'Python'})
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  • Limit the number of rows in output 
db.comments.find().limit(2)
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  • Count the number of rows in the output 
db.comments.find().count()
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  • Update a row 
db.comments.update({name: 'Teja'},
{'name': 'yash',
    'lang': 'JavaScript',
    'meme': 1
}, {upsert: true})
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  • Mongodb Increment Operator 
db.comments.update({name: 'Rohan'},
{$inc:{
    meme: 2
}})
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  • Mongodb Rename Operator 
db.comments.update({name: 'Rohan'},
{$rename:{
    meme: 'member'
}})
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  • Delete Row 
db.comments.remove({name: 'yash'})
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  • Less than 
db.comments.find({member_since: {$lt: 90}})
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  • Less than equals to 
db.comments.find({member_since: {$lte: 90}})
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  • Greater than 
db.comments.find({member_since: {$gt: 90}})
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  • Greater than equals to 
db.comments.find({member_since: {$gte: 90}})
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clickhere to see MongoDb commands

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