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‎articles/cosmos-db/mongodb/tutorial-query.md

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---
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title: Query data with Azure Cosmos DB's API for MongoDB
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description: Learn how to query data from Azure Cosmos DB's API for MongoDB by using MongoDB shell commands
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description: Learn how to query data from Azure Cosmos DB's API for MongoDB by using MongoDB shell commands.
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author: gahl-levy
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ms.author: gahllevy
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ms.service: cosmos-db
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ms.subservice: mongodb
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ms.custom: ignite-2022
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ms.topic: tutorial
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ms.date: 12/03/2019
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ms.date: 03/14/2023
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ms.reviewer: mjbrown
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---
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# Query data by using Azure Cosmos DB's API for MongoDB
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[!INCLUDE[MongoDB](../includes/appliesto-mongodb.md)]
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The [Azure Cosmos DB's API for MongoDB](introduction.md) supports [MongoDB queries](https://docs.mongodb.com/manual/tutorial/query-documents/).
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The [Azure Cosmos DB's API for MongoDB](introduction.md) supports [MongoDB queries](https://docs.mongodb.com/manual/tutorial/query-documents/).
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This article covers the following tasks:
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This article covers the following tasks:
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> [!div class="checklist"]
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> * Querying data stored in your Azure Cosmos DB database using MongoDB shell
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You can get started by using the examples in this document and watch the [Query Azure Cosmos DB with MongoDB shell](https://azure.microsoft.com/resources/videos/query-azure-cosmos-db-data-by-using-the-mongodb-shell/) video .
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You can get started by using the examples in this article.
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## Sample document
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"isRegistered": false
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}
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```
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## <a id="examplequery1"></a> Example query 1
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Given the sample family document above, the following query returns the documents where the id field matches `WakefieldFamily`.
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## <a id="examplequery1"></a> Example query 1
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**Query**
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Given the sample family document, the following query returns the documents where the `id` field matches `WakefieldFamily`.
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Query:
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```bash
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db.families.find({ id: "WakefieldFamily"})
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```
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**Results**
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Results:
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```json
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{
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}
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```
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## <a id="examplequery2"></a>Example query 2
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## <a id="examplequery2"></a>Example query 2
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The next query returns all the children in the family.
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The next query returns all the children in the family.
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**Query**
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Query:
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```bash
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```bash
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db.families.find( { id: "WakefieldFamily" }, { children: true } )
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```
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```
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**Results**
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Results:
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```json
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{
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}
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```
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## <a id="examplequery3"></a>Example query 3
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## <a id="examplequery3"></a>Example query 3
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The next query returns all the families that are registered.
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The next query returns all the families that are registered.
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**Query**
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Query:
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```bash
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db.families.find( { "isRegistered" : true })
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```
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```
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**Results**
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Results:
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No document will be returned.
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No document is returned.
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## <a id="examplequery4"></a>Example query 4
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The next query returns all the families that are not registered.
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The next query returns all the families that aren't registered.
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**Query**
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Query:
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```bash
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db.families.find( { "isRegistered" : false })
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```
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```
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**Results**
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Results:
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```json
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{
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"_id": ObjectId("58f65e1198f3a12c7090e68c"),
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"id": "WakefieldFamily",
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"parents": [{
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"familyName": "Wakefield",
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"givenName": "Robin"
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}, {
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"familyName": "Miller",
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"givenName": "Ben"
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}],
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"children": [{
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"familyName": "Merriam",
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"givenName": "Jesse",
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"gender": "female",
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"grade": 1,
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"pets": [{
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"givenName": "Goofy"
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}, {
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"givenName": "Shadow"
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}]
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}, {
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"familyName": "Miller",
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"givenName": "Lisa",
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"gender": "female",
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"grade": 8
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}],
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"address": {
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"state": "NY",
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"county": "Manhattan",
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"city": "NY"
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},
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"creationDate": 1431620462,
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"isRegistered": false
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"_id": ObjectId("58f65e1198f3a12c7090e68c"),
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"id": "WakefieldFamily",
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"parents": [{
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"familyName": "Wakefield",
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"givenName": "Robin"
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}, {
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"familyName": "Miller",
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"givenName": "Ben"
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}],
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"children": [{
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"familyName": "Merriam",
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"givenName": "Jesse",
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"gender": "female",
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"grade": 1,
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"pets": [{
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"givenName": "Goofy"
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}, {
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"givenName": "Shadow"
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}]
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}, {
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"familyName": "Miller",
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"givenName": "Lisa",
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"gender": "female",
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"grade": 8
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}],
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"address": {
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"state": "NY",
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"county": "Manhattan",
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"city": "NY"
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},
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"creationDate": 1431620462,
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"isRegistered": false
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}
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```
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## <a id="examplequery5"></a>Example query 5
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The next query returns all the families that are not registered and state is NY.
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The next query returns all the families that aren't registered and state is NY.
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**Query**
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Query:
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```bash
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db.families.find( { "isRegistered" : false, "address.state" : "NY" })
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```
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```
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**Results**
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Results:
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```json
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{
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"_id": ObjectId("58f65e1198f3a12c7090e68c"),
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"id": "WakefieldFamily",
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"parents": [{
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"familyName": "Wakefield",
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"givenName": "Robin"
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}, {
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"familyName": "Miller",
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"givenName": "Ben"
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}],
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"children": [{
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"familyName": "Merriam",
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"givenName": "Jesse",
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"gender": "female",
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"grade": 1,
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"pets": [{
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"givenName": "Goofy"
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}, {
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"givenName": "Shadow"
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}]
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}, {
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"familyName": "Miller",
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"givenName": "Lisa",
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"gender": "female",
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"grade": 8
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}],
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"address": {
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"state": "NY",
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"county": "Manhattan",
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"city": "NY"
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},
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"creationDate": 1431620462,
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"isRegistered": false
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"_id": ObjectId("58f65e1198f3a12c7090e68c"),
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"id": "WakefieldFamily",
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"parents": [{
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"familyName": "Wakefield",
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"givenName": "Robin"
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}, {
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"familyName": "Miller",
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"givenName": "Ben"
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}],
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"children": [{
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"familyName": "Merriam",
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"givenName": "Jesse",
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"gender": "female",
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"grade": 1,
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"pets": [{
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"givenName": "Goofy"
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}, {
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"givenName": "Shadow"
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}]
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}, {
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"familyName": "Miller",
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"givenName": "Lisa",
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"gender": "female",
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"grade": 8
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}],
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"address": {
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"state": "NY",
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"county": "Manhattan",
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"city": "NY"
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},
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"creationDate": 1431620462,
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"isRegistered": false
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}
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```
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## <a id="examplequery6"></a>Example query 6
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The next query returns all the families where children grades are 8.
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**Query**
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Query:
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```bash
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db.families.find( { children : { $elemMatch: { grade : 8 }} } )
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```
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**Results**
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Results:
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```json
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{
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"_id": ObjectId("58f65e1198f3a12c7090e68c"),
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"id": "WakefieldFamily",
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"parents": [{
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"familyName": "Wakefield",
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"givenName": "Robin"
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}, {
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"familyName": "Miller",
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"givenName": "Ben"
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}],
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"children": [{
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"familyName": "Merriam",
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"givenName": "Jesse",
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"gender": "female",
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"grade": 1,
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"pets": [{
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"givenName": "Goofy"
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}, {
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"givenName": "Shadow"
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}]
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}, {
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"familyName": "Miller",
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"givenName": "Lisa",
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"gender": "female",
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"grade": 8
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}],
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"address": {
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"state": "NY",
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"county": "Manhattan",
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"city": "NY"
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},
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"creationDate": 1431620462,
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"isRegistered": false
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"_id": ObjectId("58f65e1198f3a12c7090e68c"),
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"id": "WakefieldFamily",
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"parents": [{
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"familyName": "Wakefield",
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"givenName": "Robin"
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}, {
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"familyName": "Miller",
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"givenName": "Ben"
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}],
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"children": [{
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"familyName": "Merriam",
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"givenName": "Jesse",
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"gender": "female",
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"grade": 1,
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"pets": [{
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"givenName": "Goofy"
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}, {
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"givenName": "Shadow"
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}]
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}, {
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"familyName": "Miller",
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"givenName": "Lisa",
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"gender": "female",
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"grade": 8
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}],
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"address": {
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"state": "NY",
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"county": "Manhattan",
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"city": "NY"
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},
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"creationDate": 1431620462,
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"isRegistered": false
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}
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```
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## <a id="examplequery7"></a>Example query 7
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The next query returns all the families where size of children array is 3.
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**Query**
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Query:
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```bash
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db.Family.find( {children: { $size:3} } )
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```
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**Results**
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Results:
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No results will be returned as there are no families with more than two children. Only when parameter is 2 this query will succeed and return the full document.
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No results are returned because there are no families with more than two children. Only when parameter value is `2` does this query succeed and return the full document.
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## Next steps
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In this tutorial, you've done the following:
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In this tutorial, you've done the following tasks:
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> [!div class="checklist"]
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> * Learned how to query using Azure Cosmos DB’s API for MongoDB
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> * Learned how to query using Azure Cosmos DB's API for MongoDB
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You can now proceed to the next tutorial to learn how to distribute your data globally.
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