mongodb delete all elements in collection code example

Example 1: mongodb remove all from collection

db.collection.remove({})

Example 2: mongodb delete all documents

db.collection.delete_many( { } );

Example 3: delete collection mongodb

db.collection.drop()

Example 4: delete an item from db collection mongodb

db.collection.remove(
   ,
   {
     justOne: ,
     writeConcern: 
   }
)

Example 5: find All and delete in mongodb

db.products.remove( { qty: { $gt: 20 } } )