How I can use a database-name with special characters like " customer_tracker-990" in MongoDB console

Yes, use getSiblingDB(). Let us add some documents to the database −

> use customer_tracker-990;
switched to db customer_tracker-990
> db.demo1.insertOne({"Name":"Chris"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ea4697ca7e81adc6a0b3954")
}
> db.demo1.insertOne({"Name":"David"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ea46980a7e81adc6a0b3955")
}
> db.demo1.insertOne({"Name":"Bob"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5ea46984a7e81adc6a0b3956")
}

Display all documents from a collection with the help of find() method −

> db.getSiblingDB("customer_tracker-990").demo1.find();

This will produce the following output −

{ "_id" : ObjectId("5ea4697ca7e81adc6a0b3954"), "Name" : "Chris" }
{ "_id" : ObjectId("5ea46980a7e81adc6a0b3955"), "Name" : "David" }
{ "_id" : ObjectId("5ea46984a7e81adc6a0b3956"), "Name" : "Bob" }