mongodb remove duplicates

Original link http://www.cnblogs.com/zhangzili/p/4975080.htmlMongoDB knowledge points at a glance1. Start the MongoDB database:Go to the MongoDB installation directory and execute the following commandC:\Program

Plan: Install a virtual machine, Ubuntu bar, 14.04 trusty Tahr. Install MongoDB network resources:Http://mirrors.aliyun.com/ubuntu-releases/14.04/ubuntu-14.04-server-amd64.iso.torrent (Public

MongoDB Study Notes-aggregation The latest new project to use mysql has not forgotten yet. The summary records the following MongoDB aggregation. AggregationIt refers to various operations that can process batch records and return computing results.

http://blog.csdn.net/stationxp/article/details/26077439Plan:Install a virtual machine, Ubuntu bar, 14.04 trusty Tahr.Installing MongoDBNetwork resources:Http://mirrors.aliyun.com/ubuntu-releases/14.04/ubuntu-14.04-server-amd64.iso.torrent (Public

These days in the study of Python web development, so prepare to do a blog to practice practiced hand, of course, just practiced hand, blog has wordpress such a good thing, why still build their own cars? decided to use the Tornado framework, and

Brief introduction MongoDB is a NoSQL database based on distributed file storage Written by the C + + language, stable and high performance Designed to deliver scalable, high-performance data storage solutions for WEB applications

Original: Https://serholiu.com/python-mongodbthese days are learning Python Web Development , so prepare to do a blog to practice practiced hand, of course, just practiced hand, blog has wordpress such a good thing, why still build their own cars?

Indexes can often greatly improve the efficiency of queries, and if there is no index, MongoDB must scan every file in the collection and select those records that meet the query criteria when reading the data. This scan full set of query efficiency

The good point is that the database does not need to be established, after the connection, if the insertion of data operations, the system can create its own, we assume a post collection, which is a number of blog posts composed of documents. Let's

Detailed examples of PHP operations on MongoDB databases (add, delete, modify, and query) (6). mongodb DatabasePHP operations on mongodb:Modules are required for PHP to operate mongodb.Official website can download: http://pecl.php.net/package/mongo