MongoDB sorting

MongoDB sort() method

Use the sort() method to sort data in MongoDB. The sort() method can specify the sorted fields through parameters, and Use 1 and -1 to specify the sorting method, where 1 is for ascending order and -1 is for descending order.

Syntax

The basic syntax of the sort() method is as follows:

>db.COLLECTION_NAME.find().sort({KEY:1})

Instance

The data in the col collection is as follows:

{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "php中文网", "url" : "http://www.php.cn", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "php中文网", "url" : "http://www.php.cn", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "title" : "MongoDB 教程", "description" : "MongoDB 是一个 Nosql 数据库", "by" : "php中文网", "url" : "http://www.php.cn", "tags" : [ "mongodb" ], "likes" : 100 }

The following example demonstrates that the data in the col collection is sorted in descending order of field likes:

>db.col.find({},{"title":1,_id:0}).sort({"likes":-1})
{ "title" : "PHP 教程" }
{ "title" : "Java 教程" }
{ "title" : "MongoDB 教程" }
>

Note: If the sorting method of the sort() method is not specified, the default is to sort in ascending order of the document.