- MongoDB CRUD Operations >
- MongoDB CRUD Reference
MongoDB CRUD Reference¶
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Query Cursor Methods¶
Name | Description |
---|---|
cursor.count() | Modifies the cursor to return the number of documents in the result set rather than the documents themselves. |
cursor.explain() | Reports on the query execution plan for a cursor. |
cursor.hint() | Forces MongoDB to use a specific index for a query. |
cursor.limit() | Constrains the size of a cursor’s result set. |
cursor.next() | Returns the next document in a cursor. |
cursor.skip() | Returns a cursor that begins returning results only after passing or skipping a number of documents. |
cursor.sort() | Returns results ordered according to a sort specification. |
cursor.toArray() | Returns an array that contains all documents returned by the cursor. |
Query and Data Manipulation Collection Methods¶
Name | Description |
---|---|
db.collection.count() | Wraps count to return a count of the number of documents in a collection or matching a query. |
db.collection.distinct() | Returns an array of documents that have distinct values for the specified field. |
db.collection.find() | Performs a query on a collection and returns a cursor object. |
db.collection.findOne() | Performs a query and returns a single document. |
db.collection.insert() | Creates a new document in a collection. |
db.collection.remove() | Deletes documents from a collection. |
db.collection.save() | Provides a wrapper around an insert() and update() to insert new documents. |
db.collection.update() | Modifies a document in a collection. |
MongoDB CRUD Reference Documentation¶
- Write Concern
- Description of the write operation acknowledgements returned by MongoDB.
- Read Concern
- Description of the readConcern option.
- SQL to MongoDB Mapping Chart
- An overview of common database operations showing both the MongoDB operations and SQL statements.
- The bios Example Collection
- Sample data for experimenting with MongoDB. insert(), update() and find() pages use the data for some of their examples.
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