Building Multiple Indexes at Once in MongoDB

In order to build multiple indexes at once, you need to use createIndexes() and pass multiple keys into an array. Following is the query for building multiple indexes at once.

>db.multipleIndexesDemo.createIndexes([{"First":1},{"Second":1},{"Third":1},{"Fourth":1},{"Fifth":1}]);

This will produce the following output

{
   "createdCollectionAutomatically" : true,
   "numIndexesBefore" : 1,
   "numIndexesAfter" : 6,
   "ok" : 1
}

Now get all the indexes

> db.multipleIndexesDemo.getIndexes();

This will produce the following output

[
   {
      "v" : 2,
      "key" : {
         "_id" : 1
      },
      "name" : "_id_",
      "ns" : "test.multipleIndexesDemo"
   },
   {
      "v" : 2,
      "key" : {
         "First" : 1
      },
      "name" : "First_1",
      "ns" : "test.multipleIndexesDemo"
   },
   {
      "v" : 2,
      "key" : {
         "Second" : 1
      },
      "name" : "Second_1",
      "ns" : "test.multipleIndexesDemo"
   },
   {
      "v" : 2,
      "key" : {
         "Third" : 1
      },
      "name" : "Third_1",
      "ns" : "test.multipleIndexesDemo"
   },
   {
      "v" : 2,
      "key" : {
         "Fourth" : 1
      },
      "name" : "Fourth_1",
      "ns" : "test.multipleIndexesDemo"
   },
   {
      "v" : 2,
      "key" : {
         "Fifth" : 1
      },
      "name" : "Fifth_1",
      "ns" : "test.multipleIndexesDemo"
   }
]