Update Query in mangoDB

Update one Document

UpdateOne()=>db.COLLECTION_NAME.updateOne(<filter>,<update>)

Update multiple Document

UpdateMany()=>db.COLLECTION_NAME.updateMany(<filter>,<update>)

1. Update the JavaScript type value to "Full Stack".

> show dbs
admin       0.000GB
config      0.000GB
local       0.000GB
shreyashdb  0.000GB

> use shreyashdb
switched to db shreyashdb

> db
shreyashdb

> show collections
shreyashdb

> db.shreyashdb.find().pretty()
{
        "_id" : ObjectId("61ca837682bfb31fe50836eb"),
        "name" : "ReactJS",
        "type" : "Front End",
        "blogpost" : 100,
        "active" : true
}
{
        "_id" : ObjectId("61ca89a182bfb31fe50836ec"),
        "name" : "shreyash kolhe",
        "email" : "shreyashkolhe2001@gmail.com",
        "role" : "developer",
        "active" : true
}

The $set operator replaces the value of a field with the specified value.

> db.shreyashdb.updateOne({name:"ReactJS"}, {$set: {type: "Full Stack"}})
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }

> db.shreyashdb.find().pretty()
{
        "_id" : ObjectId("61ca837682bfb31fe50836eb"),
        "name" : "ReactJS",
        "type" : "Full Stack",
        "blogpost" : 100,
        "active" : true
}
{
        "_id" : ObjectId("61ca89a182bfb31fe50836ec"),
        "name" : "shreyash kolhe",
        "email" : "shreyashkolhe2001@gmail.com",
        "role" : "developer",
        "active" : true
}

2. Update all the fields with the type value equal to "Front End" and set the value of email to shreyashkolhe2001@gmail.com.

> show dbs
admin       0.000GB
config      0.000GB
local       0.000GB
shreyashdb  0.000GB
test        0.000GB

> show collections
test

> db.test.insertMany([{name:"shreyash",sirname:"kolhe",role:"front-end",email:"skd@gmail.com"}, {name:"vabhav",sirname:"bandal",role:"front-end",email:"skd@gmail.com"},{name:"shubham",sirname:"gawali",role:"backend",email:"skd@gmail.com"},{name:"xyh",sirname:"xyz",role:"front-end",email:"skd@gmail.com"}])
{
        "acknowledged" : true,
        "insertedIds" : [
                ObjectId("61cabfab23c54413fe585b4b"),
                ObjectId("61cabfab23c54413fe585b4c"),
                ObjectId("61cabfab23c54413fe585b4d"),
                ObjectId("61cabfab23c54413fe585b4e")
        ]
}

> show dbs
admin       0.000GB
config      0.000GB
local       0.000GB
shreyashdb  0.000GB
test        0.000GB

> show  collections
test

> db.test.find().pretty()
{
        "_id" : ObjectId("61cabea123c54413fe585b4a"),
        "name" : "shreyash",
        "email" : "sk@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4b"),
        "name" : "shreyash",
        "sirname" : "kolhe",
        "role" : "front-end",
        "email" : "skd@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4c"),
        "name" : "vabhav",
        "sirname" : "bandal",
        "role" : "front-end",
        "email" : "skd@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4d"),
        "name" : "shubham",
        "sirname" : "gawali",
        "role" : "backend",
        "email" : "skd@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4e"),
        "name" : "xyh",
        "sirname" : "xyz",
        "role" : "front-end",
        "email" : "skd@gmail.com"
}

> db.test.updateMany({role:"front-end"}, {$set: {email:"shreyashkolhe2001@gmail.com"}})
{ "acknowledged" : true, "matchedCount" : 3, "modifiedCount" : 3 }

> db.test.find().pretty()
{
        "_id" : ObjectId("61cabea123c54413fe585b4a"),
        "name" : "shreyash",
        "email" : "sk@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4b"),
        "name" : "shreyash",
        "sirname" : "kolhe",
        "role" : "front-end",
        "email" : "shreyashkolhe2001@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4c"),
        "name" : "vabhav",
        "sirname" : "bandal",
        "role" : "front-end",
        "email" : "shreyashkolhe2001@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4d"),
        "name" : "shubham",
        "sirname" : "gawali",
        "role" : "backend",
        "email" : "skd@gmail.com"
}
{
        "_id" : ObjectId("61cabfab23c54413fe585b4e"),
        "name" : "xyh",
        "sirname" : "xyz",
        "role" : "front-end",
        "email" : "shreyashkolhe2001@gmail.com"
}
>