Mongo Shell - Delete

Belge silme, hem güncelleme hem de sorgulama işlemleriyle ortak özelliklere sahiptir.

deleteMany

NOTE

Does removing all collections in a database also remove the database?

use sample_training
db.inspections.find({"date":"Feb 20 2015"}).count()
>320

db.inspections.deleteMany({"date":"Feb 20 2015"})
{ "acknowledged" : true, "deletedCount" : 320 }

deleteOne

db.inspections.findOne()
{
    "_id" : ObjectId("56d61033a378eccde8a83550"),
    "id" : "10057-2015-ENFO",
    "certificate_number" : 6007104,
    "business_name" : "LD BUSINESS SOLUTIONS",
    "date" : "Feb 25 2015",
    "result" : "Violation Issued",
    "sector" : "Tax Preparers - 891",
    "address" : {
        "city" : "NEW YORK",
        "zip" : 10030,
        "street" : "FREDERICK DOUGLASS BLVD",
        "number" : 2655
    }
}
>

db.inspections.deleteOne({"_id" : ObjectId("56d61033a378eccde8a83550")})
{ "acknowledged" : true, "deletedCount" : 1 }

drop

> show collections
companies
grades
inspections
posts
routes
trips
zips
> db.inspection.drop()
false
> db.inspections.drop()
true
> show collections
companies
grades
posts
routes
trips
zips

How to Remove a Field from a MongoDB Document ?

db.zips.findOne()
{
    "_id" : ObjectId("5c8eccc1caa187d17ca6ed16"),
    "city" : "ALPINE",
    "zip" : "35014",
    "loc" : {
        "y" : 33.331165,
        "x" : 86.208934
    },
    "pop" : 3062,
    "state" : "AL"
}
>

delete pop field

"$unset" operatörü, bir alanı ve değerini belgeden silmek için özel olarak tasarlanmıştır. -> update

> db.zips.findOne()
{
    "_id" : ObjectId("5c8eccc1caa187d17ca6ed16"),
    "city" : "ALPINE",
    "zip" : "35014",
    "loc" : {
        "y" : 33.331165,
        "x" : 86.208934
    },
    "pop" : 3062,
    "state" : "AL"
}

> db.zips.updateOne({"_id" : ObjectId("5c8eccc1caa187d17ca6ed16")},{$unset:{pop:""}})
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }

> db.zips.find({"_id" : ObjectId("5c8eccc1caa187d17ca6ed16")}).pretty()
{
    "_id" : ObjectId("5c8eccc1caa187d17ca6ed16"),
    "city" : "ALPINE",
    "zip" : "35014",
    "loc" : {
        "y" : 33.331165,
        "x" : 86.208934
    },
    "state" : "AL"
}