MongoDB Indexes
What is an Index? The indexes are the data structure that stores the collection's data set and filed values in an easy to pass-through and also stores files in the special order either Ascending or Descending and MongoDB indexes are similar to the other indexes in any of the databases. Indexes are very important in any database. For example, if you have a collection with thousands of documents and with no indexes on it, and then each query to filter documents or to find specific documents then MongoDB would need to scan the whole collection to find those documents that will surely degrade the query performance and if the collection has indexes, MongoDB would use those indexes to reduce the number of documents to be scanned in the collection. MongoDB creates a default unique index on the "_id" filed whenever we create a collection and you can't drop the index. The benefits of using indexes? It supports the efficient execution of any queries. Without ind...