What function inserts multiple documents into a collection?

What function inserts multiple documents into a collection?

Insert Multiple Documents collection. insertMany() can insert multiple documents into a collection.

Which function is used to insert more records in MongoDB collection?

insertMany() method. insertMany() is a mongo shell method, which can insert multiple documents. This method can be used in the multi-document transactions. In this method, you can add documents in the collection with or without _id field.

Which provided command creates the unique index on other field of post collection?

To create a unique index, use the db. collection. createIndex() method with the unique option set to true .

How do you create a collection and insert data in MongoDB?

To insert a single document using MongoDB Compass:

1. Navigate to the collection you wish to insert the document into:
2. Click the Insert Document button:
3. For each field in the document, select the field type and fill in the field name and value.
4. Once all fields have been filled out, click Insert.

Which operations add new documents to a collection?

Create or insert operations add new documents to a collection. If the collection does not currently exist, insert operations will create the collection.

What is foreign key and do MongoDB have foreign key?

A foreign key is a column or a group of columns that acts as a cross-reference between two tables. It consists of a primary key column on the parent table, referenced by other columns from the child tables.

Does MongoDB support foreign key?

No. MongoDB doesn’t support primary key-foreign key relationship. MongoDB has _id key field for every document that uniquely identifies the particular document.

How to insert multiple documents into a collection?

Inserts multiple documents into a collection. The insertMany () method has the following syntax: [ , , ], An array of documents to insert into the collection. Optional. A document expressing the write concern. Omit to use the default write concern.

Are there collections that will not allow duplicate items?

Is there a collection in C# that will not let you add duplicate items to it? For example, with the silly class of

When to use db.collection.insertmany in MongoDB?

db.collection.insertMany() can be used inside multi-document transactions. The collection must already exist. An insert operation that would result in the creation of a new collection are not allowed in a transaction. Do not explicitly set the write concern for the operation if run in a transaction.

Which is better single document transaction or multi document transaction?

In most cases, multi-document transaction incurs a greater performance cost over single document writes, and the availability of multi-document transactions should not be a replacement for effective schema design. For many scenarios, the denormalized data model (embedded documents and arrays) will continue to be optimal for your data and use cases.