To create an index in the Mongo Shell,
db.collection.createIndex().
db.collection.createIndex( , )
The following example creates a single key ascending index on the name field:
db.collection.createIndex( { regno: 1 } )
Viewing all the indexes
db.collection.getIndexes()
Index Names
db.student.createIndex({regno:1},{name:"index on regno"})
Dropping an Index
db.student.dropIndex("regno_1")
Dropping all Indexes
db.student.dropIndexes("regno_1","name_1")
db.student.dropIndexes()
Creating a Single Field Index
db.student.createIndex({regno:1}).
Creating a Compound Index
db.student.createIndex({regno:1,name:1})
Creating a Multi key index for the data given below
{
"_id" : ObjectId("60544b082c7bb6a353bf817a"), "name" : "satish",
"marks" : [
{"cat1" : { "maths" : 30, "chem" : 88, "eng" : 80 } },
{ "cat2" : { "maths" : 90, "chem" : 40, "eng" : 33 } }
]
}
db.students1.createIndex({"marks.cat1.maths":1})
Creating a Text index
db.comments.createIndex({post:"text"})
Searching using the text index
db.stores.find( { $text: { $search: "java coffee shop" } } )