result is fully iterated.For the example above, the limit (1) indicates that the output is only one, and if it is less than 1, it is not output, that is, the limit (n) function qualifies the maximum output. Skip (4) means that the first 4 documents in the query result are skipped, and if the result is less than 4, no document is returned. The sort ({"X": 1}) is used to set the sorting criteria, which is to sort by the X key in ascending (1) order, an
Introduction to Robomongo, robomongo
Author: zhanhailiang Date:Introduction
Robomongo is a Shell-based cross-platform MongoDB management tool. The relationship between Robomongo and MongoDB is equivalent to that between PHPMyAdmin and MySQL.Perfect support for MongoDB Shell
Robo
Before using the 2.x version of MongoDB, the Robomongo Visual management tool was selected, everything is very good, whether it is on Windows or Mac system, so it has been used. Recently upgraded to MongoDB 3.2.8, a problem was found: Robomongo cannot view the collections content of MongoDB 3.x.
First, see how you use the MongoDB version:
Using the command line, navigate to the Bin directory in the MongoDB
Directory 1. Introduction 2. 3.MongoDB installation Process Use of 4.MongoDB 5.MongoDB Add Administrator account 6.RoboMongo installation Process 7.RoboMongo Management Database 8. Summary 1 Introduction Mongo DB is a non-relational database (NOSQL) that is currently very popular in the IT industry, as long as it is a simple and practical process that describes the installation of MongoDB and its management
using Robomongo to connect MongoDB 3.x Authorization failed solution Recently installed mongodb3.1.4, and enabled authorization authentication, in DOS window operation without any problems, in order to maintain the convenience of downloading a client tool Robomongo 0.8.5, user name, password, such as configuration good solution test, the result of connection service is not a problem, permission verification
Recently installed mongodb3.1.4, and enabled authorization authentication, in DOS window operation without any problems, in order to maintain the convenience of downloading a client tool Robomongo 0.8.5, user name, password, such as configuration good solution test, the result of connection service is not a problem, permission verification did not pass , check the log, found a sentence: Failed to authenticate [e-mail protected] with mechanism mongodb-
Install Robomongo on Ubuntu and add it to the starter, ubunturobomongo
Currently, robobench is still the best client management tool for MongoDB. To install robobench on Ubuntu, you can directly download the .tar.gz package from the official website and decompress it. Then, run the robomongo file in the bin directory to start the interface. For example, extract the downloaded .tar.gz package to the/usr/loc
Label:At the beginning of the installation of the time still feel very simple really loaded when the information on the Internet is uneven again to organize a installation method Separately to download MongoDB and Robomongo The author here is MONGO 3.0.5 Robomongo is 0.8.5, respectively, has been confirmed after the installation of Robomongo first without tube Fi
Recently installed mongodb3.1.4, and enabled authorization authentication, in DOS window operation without any problems, in order to maintain the convenience of downloading a client tool Robomongo 0.8.5, user name, password, such as configuration good solution test, the result of connection service is not a problem, permission verification did not pass , as shown in the log, found a sentence: Failed to authenticate admin@admin with mechanism mongodb-c
Robomongo 0.9.0 Connection failed while connecting to MONGO database. (IP and port number determination is right)Basic points of attention:1, the MongoDB service opens, when opened, specify the port number, the default is 27017, using the default value, do not specify.2, firewall shutdown or allow port (6666) through the firewall3, the case of authentication, database connection and user name, password to match. The correspondence between the database
Recently installed the mongodb3.0, and enabled the authorization authentication, the DOS window operation without any problems, as shown in figure:
In order to maintain the convenience of downloading a client tool Robomongo 0.8.4, user name, password, such as configuration better solution test,
As a result, the connection service does not have a problem, and permission validation does not pass, as shown:
View the log, found a sentence: Fail
Today, because of the project reason again used to MongoDB, although also contacted before, but because the demand is not much, no systematic learning. Today in detail how to learn MongoDB and a relatively good tool Robomongo, personally think it is not bad, use the JS script instead of SQL statements for data operations. I feel good. MongoDB Introduction
First put a connection [http://blog.csdn.net/zhangzhebjut/article/details/13316761]-->
later f
Install slightly. It's a personal metropolis.Here is the connection configuration.The main introduction is to create a set of data through Robomongo to achieve two machine data can be quickly migrated, without the shell command to slowly knock.It is mainly to simplify the process of migrating a single table or a small amount of data.1. Create a new collection test.2. Click the Insert.3. A box appears.4. Go to another machine, find the appropriate data
SummaryAccustomed to visualizing the way of managing data, by knocking commands, it's really uncomfortable. A MongoDB visualization tool is recommended here--robomongoRelated articlesGetting started with [MongoDB][MongoDB] additions and deletions change[Mongodb]count,gourp,distinct[Mongodb]mapreduce[MongoDB] Profiling Performance Analysis[MongoDB] IndexMongodb C # Additions and deletions changeMongoDB Training[MongoDB] Array operationsRobomongo: Https://robomongo.org/downloadThe installation is
Robomongo,mongo Visualization Tools
Wow, actually she is three (sinister face).You see, the interface is fresh, let people feel relaxed (shy), who still want to Win+r+mongo ah ah.Oh, yes, go on ... Say the right thing.
In here ... Using SQL to further understand the MongoDB
SQL Terminology/Concepts
MongoDB Terminology/Concepts
Interpretation/Description
Database
Database
Database tables
Table
That's the mistake!I searched the Internet. The solution is almost all about the issue of authentication mechanisms:>Use Admin switched to DB admin>Db.system.version.find () {"_id":"featurecompatibilityversion","version":"3.4" } { "_id":"Authschema","CurrentVersion":5}Then delete the user after the "CurrentVersion": Change to 3 and finally add the user.But I tried it many times and I didn't use!!!!!!!!!!!!!!!!!!!!.If you use the above solution, it may be a mechanism problem. If not, you should n
Transferred from: http://blog.csdn.net/iijse/article/details/6161143Hql Query methodThis is one of my most used and favorite, because it is flexible and intuitive to write, and not much worse than the syntax of the familiar SQL. Conditional query, paged query, connection query, nested
In order to make it easier for everyone to understand the SQL statement I cited, this article assumes that a student performance management database has been established, and the full text is described as an example of student performance management.
1. Display column names in query results:
A. With AS keyword: select name as ' name ' from students
B. Direct representation: Select name ' Name ' from students
2. Accurate Search:
A. In limited scope: SE
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