mongodb online shell

This is a bit of an omission from previous articles about using MongoDB's shell to execute scripts, which is now supplemented in this blog post;One, passing in the script file on the command lineDefine a JAVASCIPRT file with the following name: Script1.js, as follows: Print ("I am Albert Shao in the Script1.js") Define another JavaScript file, named Script2, with the following content: Print ("I like to read and study") Run

Label:I. Data storage structure MongoDB storage data is divided into 3 layers. Dbs--collections--documents. At the bottom is documents, which stores data in JSON format. Collections is a dynamic collection of files that can be understood as a drawer for storing files. DBS is a database that can be understood as a bookcase composed of multiple drawers. Second, CRUD (creat, read, Updata, delete) operations 1. Create The Db.collection.insert () method i

Edit session. in themongo shell, typemyfunction to See the function definition: myFunction The result should is the changes from your saved edit: function Myfun Ction () {print ("This is edited");} Note: As MONGO Shell interprets code edited in a external editor, it may modify code in functions, depending on the Ja Vascript compiler. For MONGO could convert to 2 or remove comment

One, Windows download installation1. To http://www.mongodb.org/downloads download, MongoDB is installed by default in C:\Program Files\mongodb directory, to F:\Office\Database\ Mongodbdata New Mongodbdata directory is used to store mongodb data.Execute cmd commandExecutive Mongod.exe2. Setting Environment variablesGo to the Windows environment variable to add C:\

Client Support for MongoDB As a very mature NoSQL database, MONGDB support for a variety of programming languages has been very perfect, and now support the major mainstream programming languages include:1,mongo Shell2,python3,java4,c#5,node.js6,c++ In these languages, the simplest, most lightweight of the MONGO shell, without any other dependent environment, only need a MONGO client, you can connect the l

Project name: Online Shell Command Interpreter Objective: To practice socket programming Function: You can use Windows telnet to remotely log on to the Linux system, run your own shell command parser, and perform some simple internal and external commands, the operation commands and running results are displayed on the Windows Telnet terminal. Source c

1. Shell Connection using MongoDB:Start Mongodb:mongod--dbpath d:\mongoDB\dbOpen new shell, connect Mongodb:mongo 2. Shell Basic Command:MongoDB command-line OperationsView all databases: Show DBSUsing a database: Use MyDBView all collections: Show CollectionsView all elements of a collection: Db.mycollection.fin

ECStore open-source online shop system Arbitrary File Modification Vulnerability can be shell Brief description: The file editing function in template editing does not have strict restrictions on editable files. As a result, any files in the system can be modified. Select the file to be modified in the file editing function. Select the image here (the template file can also be used). Then, when uploading th

Label:MongoDB is a very popular NoSQL database management system, officially: MongoDB, I installed in localhost is the Enterprise Server version, the default installation file directory is: C:\Program files\mongodb\server\3.2\bin, click Windows+r, enter cmd, start command Prompt, go to the installation directory Every time you open command prompt you need to enter the installation directory of

First, the script functionTo determine whether the IP is occupied, the ping rule is considered to be occupied and the results are output to ip_yes.txt and Ip_no.txt, respectively, by means of the ping command detection.Second, script writing#!/bin/bash#Check the network is onlineip_num=192.168.1.For i in ' SEQ 1 254 'DoPing-c 2 $ip _num$i >/dev/nullIf [$? = 0];thenecho "Echo $ip _num$i is yes"Echo $ip _num$i is yes >> ip_yes.txtElseecho "Echo $ip _num$i is no"Echo Echo $ip _num$i is no >> ip_no.

file.Hold and Swap: H command and x commandSwaps the pattern space and preserves the contents of the buffer. That is, the line that contains test and check is swapped:Sed-e '/test/h '-E '/check/x ' file Script ScriptFileThe SED script is a list of SED commands that boot the script file name with the-F option when you start sed. Sed is very picky about the commands entered in the script, and cannot have any whitespace or text at the end of the command, separated by semicolons if there are multip

Small code SHELL 30 minutes online

MongoDB shell obtains the maximum and minimum values. mongodbshell MongoDB does not find a dedicated method to calculate the maximum value, but it can be replaced by sorting and getting the first one. The following collection data is as follows: { "_id" : ObjectId("54c39358acace71b1bd20a70"), "epoch_min" : NumberLong(1422030840), "usage_ratio" : 0.03514000773429

A new requirement was received in the previous two days to monitor the maximum number of MongoDB connections, memory usage, etc. in the Linux shell script. But I do not understand the Linux Shel, just a few simple common Linux operations, as long as a wild search, and finally many attempts to finally get these values. The steps for success are as follows: 0, Write a line of data that

variable P to modify the first record Db.persons.update (p,{name: "uspcat000"}) Db.perons.findOne () adds a field to an existing record. MONGO can arbitrarily increase any type of field in a record First , modify the value of the first record to age=1 Db.persons.update (P,{age:1}) and then update Db.persons.update ({age:1},{$set: {name: "Hello.world"}}) The above code means that when the first reco

The shell command operation syntax is similar to that of JavaScript. In fact, the underlying query statements on the console are all completed using JavaScript scripts. Run the shell command to start cmd.exe. Common shell commands are as follows: 1. query the names of all local databases > show dbs; 2. Switch to the specified database environment (if no databa

This script implements the following functions: 1. Backing up mysql databases online; 2. Saving backup logs to log files; 3. compressing data backup files; 4. Remotely ftp the compressed file to the backup server; 5. deleting data that has been backed up locally for more than seven days is mainly to prevent the abnormal growth of the disk space of the production server from leading to performance bottlenecks. The specific implementation of

How to use peanut shell 2.0+wordpress to build personal website? Hurry ~ ~ ~ Online Peanut shells have been built! WordPress has also been installed, can be used in the local normal use, and now in the background settings inside the configuration is: But I changed it to the following After the submission of the error, please tell me what's going on? How to solve? Urgent ~~~~~ ------to solve the idea--

Common shell for mongodb and mongodbshell > Use cmd_test // create a database Switched to db pai_test > Db. createCollection ("test") // create a table as a set. {"OK": 1} > Db. Db. addUser (db. group ( Db. adminCommand (db. groupcmd ( Db. auth (db. groupeval ( Db. changeUserPassword (db. hasOwnProperty ( Db. cloneCollection (db. help ( Db. cloneDatabase (db. hostInfo ( Db. commandHelp (db. isMaster ( Db. c

{} Specifies that those columns are displayed and not displayed (0 means that 1 is not displayed). Query showing 2nd, 3 document data The default parameter for the Skip () method is 0. Skip and limit combine to achieve paging. sorting Sort () methodIndex Ensureindex () method Multiple field indexes:db.student.ensureIndex({"name":1,"hobby":-1}) Polymerization aggregate ()Only one method is used here, grouped and counted,