Delete Operation

Delete a single document

shop> db.comments.deleteOne({_id: 1})
{ acknowledged: true, deletedCount: 1 }

Delete a field from the document

• It is basically update operation.

shop> db.comments.updateOne({_id:6}, {$unset: {metadata: 1}})
{
  acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,
  upsertedCount: 0
}
shop> db.comments.find({_id:6})
[
  {
    _id: 6,
    title: 'Schema Design Best Practices',
    content: 'Designing schemas for optimal performance...',
    author: 'Emily Brown',
    comments: [
      { user: 'Kevin', text: 'Invaluable insights!' },
      { user: 'Lily', text: 'Well-structured explanations.' }
    ],
    status: false
  }
]

Delete multiple documents

shop> db.products.deleteMany({price:55})
{ acknowledged: true, deletedCount: 6 }