$limit (Aggregation) in MongoDB

This operator uses to pass n documents to the next pipeline where n is the specified limit.

See the following example.

use Test

db.Inventory.insert( { "Title":"MongoDB Tutorial by codefari.com", "ISBN":"1990987666765", "AccessCountry":["India","China"], }) db.Inventory.insert( { "Title":"SQL Server tutorial by codefari.com", "ISBN":"9909876765476", "AccessCountry":["USA"], }) db.Inventory.insert( { "Title":"C# tutorial by codefari.com", "ISBN":"8898877676544", "AccessCountry":["UK"], }) db.Inventory.find()

Output

/* 0 */ {     "_id" : ObjectId("5655b294583c040b3341b96e"),     "Title" : "MongoDB Tutorial by codefari.com",     "ISBN" : "1990987666765",     "AccessCountry" : [         "India",         "China"     ] } /* 1 */ {     "_id" : ObjectId("5655b294583c040b3341b96f"),     "Title" : "SQL Server tutorial by codefari.com",     "ISBN" : "9909876765476",     "AccessCountry" : [         "USA"     ] } /* 2 */ {     "_id" : ObjectId("5655b294583c040b3341b970"),     "Title" : "C# tutorial by codefari.com",     "ISBN" : "8898877676544",     "AccessCountry" : [         "UK"     ] }

Now the following query to select top 2 records only using $limit.

db.Inventory.aggregate(     {$limit:2} )

Output

/* 0 */ {     "result" : [         {             "_id" : ObjectId("5655b294583c040b3341b96e"),             "Title" : "MongoDB Tutorial by codefari.com",             "ISBN" : "1990987666765",             "AccessCountry" : [                 "India",                 "China"             ]         },         {             "_id" : ObjectId("5655b294583c040b3341b96f"),             "Title" : "SQL Server tutorial by codefari.com",             "ISBN" : "9909876765476",             "AccessCountry" : [                 "USA"             ]         }     ],     "ok" : 1 }