Docs Home → MongoDB Manual

MongoDB CRUD OperationsMongoDB CRUD操作

On this page本页内容

CRUD operations create, read, update, and delete documents.CRUD操作创建、读取、更新和删除文档。

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，则插入操作将创建该集合。

MongoDB provides the following methods to insert documents into a collection:MongoDB提供了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中的所有写操作都是单个文档级别上的原子操作。

The components of a MongoDB insertOne operations.

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. 读取操作从集合中检索文档；即在集合中查询文档。MongoDB provides the following methods to read documents from a collection:MongoDB提供了以下方法来读取集合中的文档：

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。

The components of a MongoDB find operation.

For examples, see:

Update Operations更新操作

Update operations modify existing documents in a collection. 更新操作修改集合中的现有文档。MongoDB provides the following methods to update documents of a collection:MongoDB提供了以下方法来更新集合的文档：

In MongoDB, update operations target a single collection. 在MongoDB中，更新操作针对单个集合。All write operations in MongoDB are atomic on the level of a single document.MongoDB中的所有写操作都是单个文档级别上的原子操作。

You can specify criteria, or filters, that identify the documents to update. 您可以指定用于标识要更新的文档的条件或筛选器。These filters use the same syntax as read operations.这些筛选器使用与读取操作相同的语法。

The components of a MongoDB updateMany operation.

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. 删除操作从集合中删除文档。MongoDB provides the following methods to delete documents of a collection: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中的所有写操作都是单个文档级别上的原子操作。

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。

The components of a MongoDB deleteMany operation.

For examples, see Delete Documents.有关示例，请参阅删除文档。

Bulk Write大容量写入

MongoDB provides the ability to perform write operations in bulk. For details, see Bulk Write Operations.MongoDB提供了批量执行写操作的能力。有关详细信息，请参阅大容量写入操作。