mongodb aggregate sort

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MongoDB notes (MongoDB $type operator, limit and skip methods, sort () method, index, aggregation (aggregate))

/*** MongoDB $type operator*/ /*** The $type operator is based on the Bson type to retrieve the matching data type in the collection and returns the result.* The types of MongoDB that can be used are shown in the following table:* Type Number Notes*

MongoDB Aggregate use personal summary _mongodb

Recently has been using MongoDB, sometimes will need to use statistics, on the Internet to check some information, the most suitable for use is to use aggregate, the following introduction of their own use of experience. MongoDB

"Turn" MongoDB knowledge points at a glance

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

Introduction and use of aggregation tools aggregate in MongoDB

Aggregate is the more important of the many tools that MongoDB provides, similar to the one in SQL statements GROUP BY . The aggregation tool allows developers to manipulate data in the database directly using MongoDB native commands, and aggregates

PHP operation MongoDB Implementation and deletion of the function

This article mainly introduces the PHP operation MongoDB implementation of adding and removing functions, combined with examples of the form of a summary of the PHP operation MongoDB Common skills, and with PHP7 operation MongoDB method, with a

PHP operation MongoDB Implementation and additions and deletions PHP skills

This article mainly introduces the PHP operation MongoDB implementation of adding and removing functions, combined with examples of the form of a summary of the PHP operation MongoDB Common skills, and with PHP7 operation MongoDB method, with a

Mongodb Aggregate functions

Mongodb Aggregate functions 1. the count function is very understandable. Like other databases, it is used to perform the count operation selectcount (*) fromtab1db. the tab1.count () and above examples are quite understandable, but if there are

MongoDB Learning Summary (i)

1. Download extract MongoDB, configure environment variablesTAR-ZXVF mongodb-linux-x86_64-rhel62-3.2.7.tgzExport Path=/bin: $PATH2. Create a data Save directoryMkdir-p/data/db3.mongodb Boot./mongod//Default boot./mongod--dbpath=/data/db//Start

MongoDB document Aggregate Chapter Read the notes

Aggregate contains the different types in 3:1. Pipeline2. Single function aggregation (COUNT,GROUP,DISTINCT)3. Map-reducePipeline expressionA pipe expression can only manipulate documents that are currently in the pipeline and cannot represent other

MongoDB Aggregate using the article (turn)

Http://www.cnblogs.com/qq78292959/p/4440679.html Recently has been using MongoDB, sometimes need to use statistics, on the Internet to check some information, the most suitable use is to use aggregate, the following introduction of their own use

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