MongoDB Shell

https://www.mongodb.com/docs/mongodb-shell/
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MongoDB Shell (mongosh) is an interactive JavaScript and Node.js REPL environment used for querying,...
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### Snippet installation confirmation

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

Example output showing the installation process and the prompt to load the newly installed snippet.

```javascript
 Running install...
 Installed new snippets analyze-schema. Do you want to load them now? [Y/n]: y
 Finished installing snippets: analyze-schema
```

--------------------------------

### Example output of mongosh --build-info

Source: https://www.mongodb.com/docs/mongodb-shell/install

This is the output of the --build-info command, showing version, build architecture, platform, and dependency versions. It is useful for verifying your installation and checking for the security issue.

```javascript
{
  "version": "2.5.8",
  "distributionKind": "packaged",
  "buildArch": "x64",
  "buildPlatform": "linux",
  "buildTarget": "unknown",
  "buildTime": "2025-09-09T10:18:30.614Z",
  "gitVersion": "7b6bd25a97ce617f8d5bfa26c36db6d99dc92419",
  "nodeVersion": "v24.9.0",
  "opensslVersion": "3.6.0",
  "sharedOpenssl": true,
  "runtimeArch": "x64",
  "runtimePlatform": "darwin",
  "runtimeGlibcVersion": "N/A",
  "deps": {
    "nodeDriverVersion": "6.19.0",
    "kerberosVersion": "2.2.2"
  }
}
```

--------------------------------

### Install and run analyze-schema snippet

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

Install the 'analyze-schema' snippet and execute it against the 'reservations' collection.

```javascript
snippet install analyze-schema
schema(db.reservations)
```

--------------------------------

### db.adminCommand.help() for method help

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Type db.<method name>.help() to get help for a specific database method. This example returns help for db.adminCommand().

```javascript
db.adminCommand.help()
```

```javascript
  db.adminCommand({ serverStatus: 1 }):

  Runs an arbitrary command against the admin database.

  For more information on usage: https://www.mongodb.com/docs/manual/reference/method/db.adminCommand
```

--------------------------------

### Install a snippet package

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/packages

Install a snippet package by name. Replace YOUR_NEW_SNIPPET with the actual snippet name.

```shell
snippet install YOUR_NEW_SNIPPET
```

--------------------------------

### Install gnupg if missing

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs gnupg and its required libraries when the previous key import fails with a gnupg error.

```sh
sudo apt-get install gnupg
```

--------------------------------

### db.serverCmdLineOpts()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/methods

Returns a document with information about the runtime options used to start the MongoDB instance.

```APIDOC
## db.serverCmdLineOpts()

### Description
Returns a document with information about the runtime options used to start the MongoDB instance.

### Method
GET

### Endpoint
`db.serverCmdLineOpts()`

### Response
#### Success Response
Returns runtime options.

#### Response Example
```json
{
  "argv": [],
  "parsed": {}
}
```
```

--------------------------------

### Install mongocompat snippet

Source: https://www.mongodb.com/docs/mongodb-shell/reference/compatibility

Use this command to install the mongocompat snippet, which provides access to legacy mongo shell APIs.

```shell
snippet install mongocompat
```

--------------------------------

### Install a snippet package

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

Use this command to install a specific snippet package by name.

```javascript
snippet install <name>
```

--------------------------------

### Verify mongosh installation with mongosh --version

Source: https://www.mongodb.com/docs/mongodb-shell/install/?amazon-linux-version=None&debian-version=None&linux-distribution=None&macos-installation-method=None&operating-system=windows&rhel-version=None&ubuntu-version=None&windows-installation-method=msiexec

Run this command in a command prompt to confirm that mongosh installed successfully. It returns the version of mongosh you installed.

```bash
mongosh --version  
---  
```

--------------------------------

### buildInfo() output example

Source: https://www.mongodb.com/docs/mongodb-shell/reference/methods

Shows the JSON document returned by buildInfo(), describing the mongosh build and driver dependencies.

```json
{
  version: '1.10.1',
  distributionKind: 'packaged',
  buildArch: 'x64',
  buildPlatform: 'linux',
  buildTarget: 'unknown',
  buildTime: '2023-06-21T09:49:37.225Z',
  gitVersion: '05ad91b4dd40382a13f27abe1ae8c3f9f52a38f7',
  nodeVersion: 'v16.20.1',
  opensslVersion: '3.1.1',
  sharedOpenssl: true,
  runtimeArch: 'x64',
  runtimePlatform: 'darwin',
  deps: {
     nodeDriverVersion: '5.6.0',
     libmongocryptVersion: undefined,
     libmongocryptNodeBindingsVersion: undefined
   }
}
```

--------------------------------

### Example database and hostname prompt

Source: https://www.mongodb.com/docs/mongodb-shell/write-scripts

The visual representation of the shell prompt showing the database name and hostname.

```javascript
admin@centos0722:27502>
```

--------------------------------

### Example Usage of mongocompat Snippet

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

Demonstrates the legacy shell compatibility APIs provided by the mongocompat snippet.

```js
> Array.sum([1, 2, 3])
6
> tojsononeline({a:1,b:2,c:3})
{  "a" : 1,  "b" : 2,  "c" : 3 }
```

--------------------------------

### ObjectId class help examples

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Run either command to view help for the ObjectId BSON class. Both return the same output.

```javascript
ObjectId.help()
```

```javascript
ObjectId().help()
```

--------------------------------

### Create sales Collection for Examples

Source: https://www.mongodb.com/docs/mongodb-shell/reference/ejson/serialize

Inserts sample documents into the sales collection, including ISODate and Decimal128 types, to be used in the subsequent examples.

```javascript
db.sales.insertMany( [
   { custId: 345, purchaseDate: ISODate("2023-07-04"),
     quantity: 4, cost: Decimal128("100.60") },
   { custId: 346, purchaseDate: ISODate("2023-07-12"),
     quantity: 3, cost: Decimal128("175.45") },
   { custId: 486, purchaseDate: ISODate("2023-08-01"),
     quantity: 9, cost: Decimal128("200.53") }
] )
```

--------------------------------

### Install mongosh with Homebrew

Source: https://www.mongodb.com/docs/mongodb-shell/install

Run this command in the terminal to install the mongosh package using Homebrew.

```sh
brew install mongosh
```

--------------------------------

### Mongo.startSession()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/methods

Starts a session for the connection.

```APIDOC
## Mongo.startSession()

### Description
Starts a session for the connection.

### Method
Mongo.startSession()

### Endpoint
Mongo.startSession()
```

--------------------------------

### Example Document Structure

Source: https://www.mongodb.com/docs/mongodb-shell/run-agg-pipelines

A sample document from the movies collection in the sample_mflix dataset.

```javascript
{
  _id: 573a1397f29313caabce8347,
  fullplot: 'In a cyberpunk vision of the future, man has developed the technology to create replicants, human clones used to serve in the colonies outside Earth but with fixed lifespans. In Los Angeles, 2019, Deckard is a Blade Runner, a cop who specializes in terminating replicants. Originally in retirement, he is forced to re-enter the force when four replicants escape from an off-world colony to Earth.',
  imdb: { rating: 8.2, votes: 419589, id: 83658 },
  year: 1982,
  plot: 'A blade runner must pursue and try to terminate four replicants who stole a ship in space and have returned to Earth to find their creator.',
  genres: [ 'Sci-Fi', 'Thriller' ],
  rated: 'R',
  metacritic: 88,
  title: 'Blade Runner',
  lastupdated: '2015-09-04 00:05:51.990000000',
  languages: [ 'English', 'German', 'Cantonese', 'Japanese', 'Hungarian' ],
  writers: [
    'Hampton Fancher (screenplay)',
    'David Webb Peoples (screenplay)',
    'Philip K. Dick (novel)'
  ],
  type: 'movie',
  tomatoes: {
    viewer: { rating: 4, numReviews: 331213, meter: 91 },
    dvd: 1997-08-27T00:00:00.000Z,
    critic: { rating: 8.5, numReviews: 102, meter: 90 },
    lastUpdated: 2015-09-12T17:48:21.000Z,
    consensus: "Misunderstood when it first hit theaters, the influence of Ridley Scott's mysterious, neo-noir Blade Runner has deepened with time. A visually remarkable, achingly human sci-fi masterpiece.",
    rotten: 10,
    production: 'Warner Bros. Pictures',
    fresh: 92
  },
  poster: 'https://m.media-amazon.com/images/M/MV5BNzQzMzJhZTEtOWM4NS00MTdhLTg0YjgtMjM4MDRkZjUwZDBlXkEyXkFqcGdeQXVyNjU0OTQ0OTY@._V1_SY1000_SX677_AL_.jpg',
  num_mflix_comments: 1,
  released: 1982-06-25T00:00:00.000Z,
  awards: {
    wins: 13,
    nominations: 15,
    text: 'Nominated for 2 Oscars. Another 11 wins & 15 nominations.'
  },
  countries: [ 'USA', 'Hong Kong', 'UK' ],
  cast: [
    'Harrison Ford',
    'Rutger Hauer',
    'Sean Young',
    'Edward James Olmos'
  ],
  directors: [ 'Ridley Scott' ],
  runtime: 117
}
```

--------------------------------

### BSON class help syntax

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Run .help() on either the class name or an instantiated instance to get a brief overview and a link with more information.

```none
<BSON class>.help()
// or
<BSON class>().help()
```

--------------------------------

### rs.initiate()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/methods

Initializes a new replica set.

```APIDOC
## rs.initiate()

### Description
Initializes a new replica set.

### Method
rs.initiate()

### Parameters
None documented.

### Response
No documented response.
```

--------------------------------

### OpenSSL configuration error on RHEL 9+

Source: https://www.mongodb.com/docs/mongodb-shell/install

If mongosh fails to start with this OpenSSL error on RHEL 9+ or derivatives like Amazon Linux 2023, install the mongodb-mongosh-shared-openssl3 package.

```none
mongosh: OpenSSL configuration error: ...:error:030000A9:digital
envelope routines:alg_module_init:unknown
option:../deps/openssl/openssl/crypto/evp/evp_cnf.c:61:name=rh-allow-sha1-signatures,
value=yes

```

--------------------------------

### Uninstall a snippet with snippet uninstall

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

Use the `snippet uninstall` command to remove a snippet. If you are unsure of the name, the `snippet ls` command lists all installed snippets. This example uninstalls the `analyze-schema` snippet.

```javascript
snippet uninstall analyze-schema
```

--------------------------------

### Create and Execute a Script to Connect and Insert Documents

Source: https://www.mongodb.com/docs/mongodb-shell/write-scripts

This example demonstrates creating a script to connect to a local database and insert sample documents, followed by executing the script and verifying the results.

```javascript
db = connect( 'mongodb://localhost/myDatabase' );

db.movies.insertMany( [
   {
      title: 'Titanic',
      year: 1997,
      genres: [ 'Drama', 'Romance' ]
   },
   {
      title: 'Spirited Away',
      year: 2001,
      genres: [ 'Animation', 'Adventure', 'Family' ]
   },
   {
      title: 'Casablanca',
      genres: [ 'Drama', 'Romance', 'War' ]
   }
] )
```

```javascript
load( "connect-and-insert.js" )
```

```javascript
use myDatabase
db.movies.find()
```

--------------------------------

### Configuration file setting inspectDepth to 20

Source: https://www.mongodb.com/docs/mongodb-shell/reference/configure-shell-settings-api

YAML configuration file that sets the inspectDepth setting to 20. This is used as the starting point in the example showing how config API settings override file settings.

```yaml
mongosh:
  inspectDepth: 20
```

--------------------------------

### sh.startBalancer()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/methods

Enables the balancer.

```APIDOC
## sh.startBalancer()

### Description
Enables the balancer.

### Method
Shell method

### Endpoint
sh.startBalancer()

### Parameters
None documented in source.

### Response
No response details documented in source.
```

--------------------------------

### Get Current Log File Path with log.getPath()

Source: https://www.mongodb.com/docs/mongodb-shell/logs/view

Shows the log.getPath() command to view the current log file location and an example output. The hexadecimal value in the path is the log identifier for the current session.

```javascript
log.getPath()
```

```javascript
/Users/jane.doe/.mongodb/mongosh/c2961dbd6b73b052671d9df0_log
```

--------------------------------

### npm installation warning

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

Warning displayed during the first use of snippets if npm is not installed.

```javascript
This operation requires downloading a recent release of npm. Do
you want to proceed? [Y/n]:
```

--------------------------------

### Show help for a specific collection method with db.collection.insertOne.help()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Use `db.<collection>.<method>.help()` to display help for a specific collection method. The example shows help for `db.collection.insertOne()`.

```javascript
db.collection.insertOne.help()
```

```none
db.collection.insertOne(document, options):

Inserts a document into a collection.

For more information on usage: https://www.mongodb.com/docs/manual/reference/method/db.collection.insertOne
```

--------------------------------

### Install mongosh with OpenSSL 3.0

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs mongosh using your system's OpenSSL 3.0 libraries.

```sh
sudo apt-get install -y mongodb-mongosh-shared-openssl3
```

--------------------------------

### Install mongosh with OpenSSL 1.1

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs mongosh using your system's OpenSSL 1.1 libraries.

```sh
sudo apt-get install -y mongodb-mongosh-shared-openssl11
```

--------------------------------

### Install mongosh with included OpenSSL

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs the latest stable version of mongosh with its bundled OpenSSL libraries.

```sh
sudo apt-get install -y mongodb-mongosh
```

--------------------------------

### db.help() to list database methods

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Run db.help() to see the list of database methods available on the db object. The output resembles the abbreviated list shown.

```javascript
db.help()
```

```none
Database Class:

  getMongo                      Returns the current database connection
  getName                       Returns the name of the DB
  getCollectionNames            Returns an array containing the names of all collections in the current database.
  getCollectionInfos            Returns an array of documents with collection information, i.e. collection name and options, for the current database.
  runCommand                    Runs an arbitrary command on the database.
  adminCommand                  Runs an arbitrary command against the admin database.
  ...
```

--------------------------------

### <BSON class>.help()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Provides a brief overview of a BSON class and a link with more information. Can be called on the class name or an instantiated instance.

```APIDOC
## <BSON class>.help()

### Description
Provides a brief overview of a BSON class and a link with more information. Can be called on the class name or an instantiated instance.

### Method
help()

### Endpoint
N/A (Shell method)

### Parameters
None

### Request Example
```javascript
ObjectId.help()
// or
ObjectId().help()
```

### Response
#### Success Response
Returns a description of the BSON class and a link to more information.

#### Response Example
```javascript
The ObjectId BSON Class:

For more information on usage: https://mongodb.github.io/node-mongodb-native/3.6/api/ObjectID.html
```
```

--------------------------------

### Example code in built-in editor

Source: https://www.mongodb.com/docs/mongodb-shell/reference/editor-mode

An example of multi-line code input within the built-in editor mode.

```javascript
// Entering editor mode (^D to finish, ^C to cancel)
var albums =
    [
       { "artist": "Beatles", "album": "Revolver" },
       { "artist": "The Monkees", "album": "Head"}
    ]

db.music.insertMany( albums )
```

--------------------------------

### Create MongoDB apt source list file

Source: https://www.mongodb.com/docs/mongodb-shell/install

Creates the list file /etc/apt/sources.list.d/mongodb-org-8.3.list for Debian, adding the MongoDB repository for trixie.

```sh
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/debian trixie/mongodb-org/8.3 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-8.3.list
```

--------------------------------

### Install mongosh with OpenSSL 3.0 libraries

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs mongosh using your system's OpenSSL 3.0 libraries.

```sh
sudo yum install -y mongodb-mongosh-shared-openssl3
```

--------------------------------

### Install mongosh with OpenSSL 1.1 libraries

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs mongosh using your system's OpenSSL 1.1 libraries.

```sh
sudo yum install -y mongodb-mongosh-shared-openssl11
```

--------------------------------

### Create registry index with make-index.js

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/packages

Run this command from the mongo-snippets directory to create the registry index file. The output is a brotli-compressed index.bson.br file.

```shell
node ./scripts/make-index.js
```

--------------------------------

### Install mongosh with included OpenSSL libraries

Source: https://www.mongodb.com/docs/mongodb-shell/install

Installs the latest stable version of mongosh with the included OpenSSL libraries.

```sh
sudo yum install -y mongodb-mongosh
```

--------------------------------

### Create MongoDB apt list file

Source: https://www.mongodb.com/docs/mongodb-shell/install

Creates the /etc/apt/sources.list.d/mongodb-org-8.3.list file for your Ubuntu version. The example uses 'focal' (Ubuntu 20.04) and supports amd64 and arm64 architectures.

```sh
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/8.3 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-8.3.list
```

--------------------------------

### Insert sample sales documents

Source: https://www.mongodb.com/docs/mongodb-shell/reference/ejson/stringify

Create a sales collection in the test database with sample documents. Required before trying the EJSON.stringify examples.

```javascript
db.sales.insertMany( [
   { custId: 345, purchaseDate: ISODate("2023-07-04"), quantity: 4, cost: Decimal128("100.60"), },
   { custId: 346, purchaseDate: ISODate("2023-07-12"), quantity: 3, cost: Decimal128("175.45"), },
   { custId: 486, purchaseDate: ISODate("2023-08-01"), quantity: 9, cost: Decimal128("200.53"), },
] )
```

--------------------------------

### Install mongosh with OpenSSL 3.0 libraries

Source: https://www.mongodb.com/docs/mongodb-shell/install

Run this command to install mongosh with your system's OpenSSL 3.0 libraries.

```sh
sudo yum install -y mongodb-mongosh-shared-openssl3

```

--------------------------------

### Import salesDeserialize.json from command line

Source: https://www.mongodb.com/docs/mongodb-shell/reference/ejson/deserialize

Imports the previously created JSON file and populates a new collection named salesFromDeserializeFile.

```sh
# Note: The example is formatted to fit the page.

mongosh --quiet  --eval "db.salesFromDeserializeFile.insertMany( \
   EJSON.deserialize( JSON.parse ( \
   fs.readFileSync( 'salesDeserialize.json', 'utf8' ) ) ) )"
```

--------------------------------

### Install mongosh with OpenSSL 1.1 libraries

Source: https://www.mongodb.com/docs/mongodb-shell/install

Run this command to install mongosh with your system's OpenSSL 1.1 libraries.

```sh
sudo yum install -y mongodb-mongosh-shared-openssl11

```

--------------------------------

### Show collection methods with db.collection.help()

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Use `db.<collection>.help()` to see the list of methods available on collection objects. The `<collection>` can be the name of an existing or non-existent collection.

```javascript
db.collection.help()
```

```none
Collection Class:

  aggregate          Calculates aggregate values for the data in a collection or a view.
  bulkWrite          Performs multiple write operations with controls for order of execution.
  count              Returns the count of documents that would match a find() query for the collection or view.
  countDocuments     Returns the count of documents that match the query for a collection or view.
  deleteMany         Removes all documents that match the filter from a collection.
  deleteOne          Removes a single document from a collection.
  ...
```

--------------------------------

### View Build Information with mongosh --build-info

Source: https://www.mongodb.com/docs/mongodb-shell/reference/options

Run this command to display JSON-formatted build information and driver dependencies for the mongosh binary.

```sh
mongosh --build-info
```

```javascript
{
  version: '1.10.1',
  distributionKind: 'packaged',
  buildArch: 'x64',
  buildPlatform: 'linux',
  buildTarget: 'unknown',
  buildTime: '2023-06-21T09:49:37.225Z',
  gitVersion: '05ad91b4dd40382a13f27abe1ae8c3f9f52a38f7',
  nodeVersion: 'v16.20.1',
  opensslVersion: '3.1.1',
  sharedOpenssl: true,
  runtimeArch: 'x64',
  runtimePlatform: 'darwin',
  deps: {
     nodeDriverVersion: '5.6.0'
   }
}
```

--------------------------------

### Install latest stable mongosh with included OpenSSL

Source: https://www.mongodb.com/docs/mongodb-shell/install

Run this command to install the latest stable version of mongosh with the included OpenSSL libraries.

```sh
sudo yum install -y mongodb-mongosh

```

--------------------------------

### Start MongoDB Shell and Display Log ID

Source: https://www.mongodb.com/docs/mongodb-shell/logs/view

Shows the output when starting the MongoDB Shell, including the log ID displayed at startup.

```javascript
$ mongosh

Current Mongosh Log ID: c2961dbd6b73b052671d9df0
Connecting to: mongodb://127.0.0.1:27017
Using MongoDB: 4.2.8
Using Mongosh: 2.13.0
```

--------------------------------

### Numeric Types Collection Example

Source: https://www.mongodb.com/docs/mongodb-shell/reference/data-types

Sample documents for the 'types' collection used in the numeric type query examples. Each document has a value and an expectedType field.

```javascript
{ _id: 1, value: 1, expectedType: 'Int32' },
{ _id: 2, value: Long("1"), expectedType: 'Long' },
{ _id: 3, value: 1.01, expectedType: 'Double' },
{ _id: 4, value: Decimal128("1.01"), expectedType: 'Decimal128' },
{ _id: 5, value: 3200000001, expectedType: 'Double' }
```

--------------------------------

### Verify mongosh Installation with mongosh --build-info

Source: https://www.mongodb.com/docs/mongodb-shell/install/upgrade/?linux-distribution=None&macos-installation-method=None&operating-system=windows&windows-installation-method=zip

Run this command to confirm that the new mongosh binary is in your system PATH and that the upgrade was successful.

```bash
mongosh --build-info  
---  
```

--------------------------------

### Start New Editing Session

Source: https://www.mongodb.com/docs/mongodb-shell/reference/editor-mode

Invokes the 'edit' command without arguments to start a new editing session, which opens with the last edit loaded.

```javascript
edit
```

--------------------------------

### List installed snippets with snippet ls

Source: https://www.mongodb.com/docs/mongodb-shell/snippets/working-with-snippets

The `snippet ls` command returns a list of locally installed snippets along with some version and source information. The output shows the snippets directory and each snippet with its source and version.

```shell
snippets@ /root/.mongodb/mongosh/snippets
├── mongosh:PRIVATE..DecryptCards@1.0.5
├── mongosh:analyze-schema@1.0.5
└── npm@7.23.0
```

--------------------------------

### mongosh --help command line option

Source: https://www.mongodb.com/docs/mongodb-shell/reference/access-mdb-shell-help

Use this command to see the options for running the mongosh executable and connecting to a deployment.

```bash
mongosh --help
```

--------------------------------

### Switch Database Command

Source: https://www.mongodb.com/docs/mongodb-shell/run-agg-pipelines

Command to switch to the sample_mflix database before running aggregation queries.

```javascript
use sample_mflix
```
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