mongodb remove field from all documents

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

The blog has moved Https://www.tianmingxing.com MongoDB is an open-source, document-oriented NoSQL (not only SQL) database written using C + +, and one of the most popular NoSQL databases. NoSQL Introduction NoSQL means "Not just SQL", is the

If you have never been familiar with MongoDB or have a little understanding of MongoDB, if you are a C # developer, take a few minutes to read this article. This article will take you step by step to get started easily. Read directory 1:

By default, queries in MongoDB return all fields in matching documents. To limit the amount of data from MongoDB sends to applications, you can include a projection document in the Quer Y operation.Projection DocumentThe projection document limits

Database Concepts Databases: Warehouses for data storage Database is a convenient management of data for us a platform, such as data storage, modification, query and so are very convenient. Database Classification There are a lot of database

official website http://www.mongodb.org1, download Mongodb-win32-i386-latest.zip decompressionMongoDB 3.1.5 requires win7 to download and install memory patches HTTPS://SUPPORT.MICROSOFT.COM/ZH-CN/HOTFIX/KBHOTFIX?KBNUM=2731284KBLN=ZH-CN2, extract to

Developers who use MongoDB should have heard of the orphan document (orphaned documents), which smelled silence and tears. This article is based on MongoDB3.0 to see how to produce a orphaned document, requires MongoDB operation mode needs to be

Introduction MongoDB is a product between relational databases and non-relational databases. It has the most abundant functions and is the most similar to relational databases. The supported data structure is very loose and is similar to the json

MongoDB (2)-learn about the installation configuration and mongodb installation Configuration I introduced the general theoretical knowledge of MongoDB. This article will install and use MongoDB on windows and linux. Of course, we will install

In the previous article, we talked about MongoDB installation and management, which involves some concepts, data structures, and some API calls. It doesn't matter if you don't know it. It's actually very simple. This article will briefly introduce