db.delete mongo code example

Example 1: drop mongo database

// First show what databases have you gotten 
show dbs
// then, use the database name that you want to drop
use YOUR_DATABASE_NAME
// now you can drop it
db.dropDatabase()
// show collections should be empty now
show collections

Example 2: delete collection mongodb

db.collection.drop()

Example 3: delete an item from db collection mongodb

db.collection.remove(
   <query>,
   {
     justOne: <boolean>,
     writeConcern: <document>
   }
)