mongodb find or operator

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

Document directory MongoDB Introduction Add the mjorm Library to the Project Create pojo Create an XML ing File Integration MongoDB Introduction Currently, there are many competing nosql products, which are used in different ways, but can

MongoDB is a document-oriented database, which is currently developed and maintained by 10gen. It has rich functions and is complete and can completely replace MySQL. In the process of using MongoDB as a product prototype, we summarized some

DescribeThe conditional operator is used to compare two expressions and fetch data from a MongoDB collection.In this section, we'll discuss how to use conditional operators in MongoDB.The condition operators in MongoDB are: (>) Greater than-

1. Download and install 64-bit: mongodb-win32-x86_64-enterprise-windows-64-2.6.4-signed.msidownloads.mongodb.comwin32mongodb-win32-x86_64-enterprise-windows-64-2.6.4-signed.msi? _ Ga1.242525191.607472782.141145202632 bit: mongodb-win32-i386-2.6.5 1.

MongoDB Quick Start1. MongoDB Introduction MongoDB is a cross-platform NoSQL document-type database that stores data in the form of Key_Value pairs. NoSQL (not only SQL) databases generally refer to non-relational databases.1.1 features of NoSQL

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

When it comes to MongoDB's architecture, it is inevitable to compare it with relational databases. Here we take MySQL for example, we make some comparisons:From the logical structure of the comparison: MySQL Hierarchy concept

First contact with MongoDB reference & paste: http://jingyan.baidu.com/article/ed15cb1b52b8661be2698162.htmlOne. Installation1. First go to the official website to downloadGo to all versions and choose a slightly less new version-because before

first, to install MongoDB 1.:http://www.mongodb.org/downloads 2. Unzip to the directory you want to install, such as D:\mongodb 3. Create folders d:\mongodb\data\db, D:\mongodb\data\log, respectively, to install the DB and log files, create a log