MongoDB

The simplest query is that MongoDB is an object-oriented one.For example, the simplest query is only three data for the entire data setFirst query for data with name Zhang SanThe condition of the query is relatively good write arbitrary

MongoDB log relative to other databases should be a very large, just because of the alarm, so I look at a bit, there is a 15G log generation, the following is my cleanup processFor security reasons, our server prohibits the use of RM commands, so I

NoSQL is very popular now, because I am in the company's environmental problems, the current lack of such a database, out of curiosity, turned over the information, but also self-study a bit. Make a note of it here.My native environment: apmserv5.2.6

url:http://blog.csdn.net/hf81970/article/details/19643639MongoDB's environment mainly includes standalone,replication and sharding. StandAlone: Single-machine environment, general development and testing when used. Replication:

New set up a replicat set, log in to primary, show dbs a look scared jumpThe local database takes up more than 80 g of space[Email protected] bin]#/mongo--host 10.1.1.31--port 27017MongoDB Shell version:2.4.6Connecting To:10.1.1.31:27017/testServer

Thanks for the reprint.(1) Download MongoDBWindow version: Http://www.mongodb.org/dr/downloads.mongodb.org/win32/mongodb-win32-i386-1.8.3.zip/download (2), Set up MongoDB directory (unzip zip file) unzip it to D:\, rename it to MongoDB, path to

1. MongoDB Installation: install MongoDB under Linux2, for MongoDB's own understanding:Object-oriented, highly extensible, such as a multi-field, or save a field, storing content as a bjon string.Manually Start MongoDB1. Create a new MONGO folder2.

MongoDB's update operation involves 4 parameters:Db.collection.update (Criteria,objnew,upsert,multi)Criteria: Query criteriaObjnew:update objects and some update operatorsUpsert: If there is no record of update, whether to insert objnew this new

NoSQL is very red now, so take MongoDB to experience a piece. Write down the essays for later use.The entire installation process is based on the description of the official web site and is built on the Windows platform. The result was successful,

(1) on the website of MongoDB download Windows version of the MONGO installation package, the installation package is the green version of the extract can be used directly. (2) The extracted Bin folder is copied to C:\mongoDB (C:\mongoDB This folder

The previous article on the basic operation of MongoDB and add and change, for the query, must follow our query requirements to go to the collection, and will find the results returned, in this process is actually the entire collection of each

MongoDB development has been to 2.6 version, since the acquisition of 100 million U.S. dollars in the wind, the development speed is much faster than before, because the previous period of time to use the cache, but also compared to MongoDB, we also

First, the installation method is given.1. Download the installation package for the corresponding platform from http://www.mongodb.org, this is Mongodb-win32-i386-2.2.1.zip2. Extract the bin from the compressed file to the installation directory,

1, download MongoDB, without compiling (if HTTPS does not, can be replaced by HTTP)wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.6.1.tgzTAR-ZXVF mongodb-linux-x86_64-2.6.1.tgzMV mongodb-linux-x86_64-2.6.1 mongodb2.6.1//Simplified

Linux environment displays all files (including hidden files)Ll-aThere are two files that can provide this "auto-set when entering the system" function, one is/ETC/BASHRC, the other is ~/.BASHRC. Where/ETC/BASHRC is executed by each user, and

Due to the behavior of each abnormal shutdown of MongoDBCause today to open MongoDB found the following error occurredUnclean shutdown detectedSolution (very

Connect to MongoDB:$MONGOOBJ New Array ( ' connect ' = =true, ' persist ' =true ));Select a library:$mongoDB $mongoObj->selectdb ("Wxdata");Select a collection:$mongoColletion=$mongoDB-

1 View Project ID numbers for individual projectsmysql-uroot-h10.10.2xx.xxshow databases;Use Bugfree2;Desc Bf_testproject;Select Projectid,projectname from Bf_testproject; (query results are as follows)2 Creating a folder under

1. MongoDB is a document Database.A record in MongoDB is a DOCUMENT,MONGODB documents be similar to JSON objects.A document can contain other documents and can contain arrays and arrays of documents.2. MongoDB has many versions, such as

$inc: Increases or decreases the specified key value and creates a key if the key does not exist.$set: Specifies a value for a key that is created if the key does not exist.$unset: Deletes the specified key.$push: Adds an element to the end of the