Database
[{"_id":123,"orderDate":"2025-01-01T12:34:56Z","items":[{"name":"Fork","shipDate":"2025-01-01T12:34:56Z","shipQuantity":6},{"name":"Spoon","shipDate":"2025-01-01T12:34:56Z"},{"name":"Knife"}]},{_id:456}]
Query
db.collection.update({},[{$unset:["orderDate","items.shipDate","items.shipQuantity"]}])