Document Structure MongoDB documents are composed of field-and-value pairs and have the following structure: { field1:value1, field2:value2, field3:value3, ... fieldN:valueN } The value of a field can be any of the BSONdata types, including other documents, arrays, and arrays of docu...
Document Structure Dot Notation Document Limitations Other Uses of the Document Structure Additional Resources MongoDB stores data records as BSON documents. BSON is a binary representation ofJSONdocuments, though it contains more data types than JSON. For the BSON spec, seebsonspec.org. See alsoBSO...
MongoDB stores data records as BSON documents. BSON is a binary representation ofJSONdocuments, thoughit contains more data types than JSON. For the BSON spec, seebsonspec.org. See alsoBSON Types. Document Structure MongoDB documents are composed of field-and-value pairs and have the following...
To create a Model,you need to create a Schema. A Schema lets youdefine the structure of an entryin the collection. This entry is also called a document. 要创建模型,您需要创建一个Schema。 使用架构可以定义集合中条目的结构。 该条目也称为文档。 Here's how you create a schema: 创建方式的方...
Data in MongoDB has a flexible schema. Collections do not enfoce document structure. Pattern In the normalized data model, the address document contains a reference to the patron document. If the address data is frequently retrivevd with name information, then with referencing, your application ne...
In MongoDB, an operation on a single document is atomic. Because you can use embedded documents and arrays to capture relationships between data in a single document structure instead of normalizing across multiple documents and collections, this single-document atomicity obviates the need for multi-...
A metadata JSON file for each collection in each database directory. For example, a metadatasales.metadata.jsonfile. The file contains a document with the exported collection metadata, options, and indexes. A metadata JSON file for each view. For example, a metadatasalesByMonthView.metadata.json...
In MongoDB, an operation on a single document is atomic. Because you can use embedded documents and arrays to capture relationships between data in a single document structure instead of normalizing across multiple documents and collections, this single-document atomicity obviates the need for multi-...
The method updates the first document where the fieldais equal to3by adding a new fieldbto the document set to1.updateResultcontains information about whether there was a matching document to update or not. Remove a document Remove the document where the fieldais equal to3. ...
In MongoDB, an operation on a single document is atomic. Because you can use embedded documents and arrays to capture relationships between data in a single document structure instead of normalizing across multiple documents and collections, this single-document atomicity obviates the need for distribu...