CRUD operations create, read, update, and delete documents.CRUD操作创建、读取、更新和删除文档。
You can connect with driver methods and perform CRUD operations for deployments hosted in the following environments:您可以连接驱动程序方法，并对以下环境中托管的部署执行CRUD操作：
You can perform CRUD operations in the UI for deployments hosted in MongoDB Atlas.您可以在MongoDB Atlas中托管的部署的UI中执行CRUD操作。
Create Operations创建操作
Create or insert operations add new documents to a collection. 创建或插入操作将新文档添加到集合中。If the collection does not currently exist, insert operations will create the collection.如果该集合当前不存在，插入操作将创建该集合。
MongoDB provides the following methods to insert documents into a collection:MongoDB提供以下方法将文档插入到集合中：
In MongoDB, insert operations target a single collection. 在MongoDB中，插入操作针对单个集合。All write operations in MongoDB are atomic on the level of a single document.MongoDB中的所有写入操作都是单个文档级别的原子操作。
For examples, see Insert Documents.有关示例，请参阅插入文档。
Read Operations读取操作
Read operations retrieve documents from a collection; i.e. query a collection for documents. MongoDB provides the following methods to read documents from a collection:读取操作从集合中检索文档；即查询集合中的文档。MongoDB提供以下方法从集合中读取文档：
You can specify query filters or criteria that identify the documents to return.您可以指定用于标识要返回的文档的查询筛选器或条件。
For examples, see:例如，请参阅：
Update Operations更新操作
Update operations modify existing documents in a collection. MongoDB provides the following methods to update documents of a collection:更新操作修改集合中的现有文档。MongoDB提供以下方法来更新集合的文档：
In MongoDB, update operations target a single collection. All write operations in MongoDB are atomic on the level of a single document.在MongoDB中，更新操作针对单个集合。MongoDB中的所有写入操作都是单个文档级别的原子操作。
You can specify criteria, or filters, that identify the documents to update. These filters use the same syntax as read operations.您可以指定用于标识要更新的文档的条件或筛选器。这些筛选器使用与读取操作相同的语法。
For examples, see Update Documents.有关示例，请参阅更新文档。
Delete Operations删除操作
Delete operations remove documents from a collection. MongoDB provides the following methods to delete documents of a collection:删除操作从集合中删除文档。MongoDB提供了以下方法来删除集合中的文档：
In MongoDB, delete operations target a single collection. 在MongoDB中，删除操作针对单个集合。All write operations in MongoDB are atomic on the level of a single document.MongoDB中的所有写入操作都是单个文档级别的原子操作。
You can specify criteria, or filters, that identify the documents to remove. These filters use the same syntax as read operations.您可以指定用于标识要删除的文档的条件或筛选器。这些筛选器使用与读取操作相同的语法。
For examples, see Delete Documents.有关示例，请参阅删除文档。
Bulk Write批量写入
MongoDB provides the ability to perform write operations in bulk. MongoDB提供了批量执行写操作的能力。For details, see Bulk Write Operations.有关详细信息，请参阅批量写入操作。