Let us first see the syntax to drop a collection −
db.getCollection("yourCollectionNameWithTwoDashes").drop();
For demo, we will create a collection name with two dashes as shown below −
> db.createCollection("company--EmployeeInformation"); { "ok" : 1 }
Create the above collection “company--EmployeeInformation “ with documents. Following is the query:
>db.getCollection("company--EmployeeInformation").insertOne({"CompanyName":"Amazon","EmployeeName":"Chris"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7c5ff6d78f205348bc654") } >db.getCollection("company--EmployeeInformation").insertOne({"CompanyName":"Google","EmployeeName":"Robert"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7c60b6d78f205348bc655") }
Following is the query to display all documents from a collection with the help of find() method −
> db.getCollection("company--EmployeeInformation").find();
This will produce the following output −
{ "_id" : ObjectId("5cd7c5ff6d78f205348bc654"), "CompanyName" : "Amazon", "EmployeeName" : "Chris" } { "_id" : ObjectId("5cd7c60b6d78f205348bc655"), "CompanyName" : "Google", "EmployeeName" : "Robert" }
Let us now drop a collection in MongoDB with two dashes in the name −
> db.getCollection("company--EmployeeInformation").drop();
This will produce the following output −
True
Look at the above output, we have dropped the collection name with two dashes.