Final answer:
To add a field to every record in MongoDB, you can use the 'updateMany' method with the '$set' operator. For example: 'db.collection.updateMany({}, {$set: {newField: "value"}});'.
Step-by-step explanation:
Adding a field to every record in MongoDB involves using the 'updateMany' method along with the '$set' operator. Here's a breakdown of the command:
db.collection: Replace "collection" with the name of your MongoDB collection.
updateMany({}, ...): The first parameter '{}' specifies the filter criteria, empty here to match all documents.
{$set: {newField: "value"}}: The '$set' operator is used to add a new field named "newField" with the specified value to each document.
For instance, if you have a collection named "myCollection," the command would be: 'db.myCollection.updateMany({}, {$set: {newField: "value"}});'. This operation will add the "newField" with the value "value" to every document in the collection.
In conclusion, utilizing the 'updateMany' method with the '$set' operator allows you to efficiently add a new field to every record in a MongoDB collection. This method is versatile and widely used for updating multiple documents simultaneously in a MongoDB database.