mongodb terminal commands

Mongodb provides easy-to-use export and import commands. 1. Introduction and use of export commands. MongoDB provides a simple export tool, which is located in {MongoDB_HOME}/bin/mongoexport.exe, for example (My mongodb is deployed in a windows operating system and is simila

collection does not exist) and the datadb. Collection name. Drop () Delete collectiondb.getcollection ("collection name") gets the information for a collectiondb.getcollectionnames () gets all the collections under the current databasedb.printcollectionstats () gets the state of all the collections under the current database crud of DataInsert: db. Collection name. Insert ({"name": "Test", "Age":), note that only one of the JSON arrays inserted, "{}", of course, can contain sub-data, but

of values, or a data or a pair of key-value pairsExample: Db.mytest.insert ({age:1,name: ' name1 ', map:[2,2]})Db.mytest.insert ({age:2,name: ' name2 ', map:[2,3]})....Db.mytest.insert ({age:5,name: ' Name5 ', map:[5,6]})Add more than one piece of dataTo create a geospatial index:Example: Db.mytest.ensureIndex ({"Map": "2d"})7. Geo-Spatial index query: use $nearFind two closest points from [5,5]: Example: Db.mytest.find ({map:{"$near": [5,5]}}). Limit (2)8. Follow the graph to find: square {"$w

of the collectionDb.drop.Database (); Deleting a databaseDb.help () See Help informationvar x=db.user.find ();X.next ();X.next (); A one-way cursor in a recordX.hasnext ();Db.collection.update (Criteria,objnew,upsert,multi)Criteria: The object used to set the query criteriaObjnew object for setting updated contentUpsert: If the record already exists, update it, otherwise add a record, the value is 0 or 1 1 already exists update 0 newMulti: If there are multiple records that match the criteria,

Tags: mongodbThree ways to build a http://blog.csdn.net/luonanqin/article/details/8497860 MongoDB clusterNoSQL = Not the only SQL MongoDB storage method is document-type storage, not key-value form.MongoDB three ways to build a cluster: Replica set/sharding/master-slaverReplica set replica set cluster principle: (The simplest way to cluster)Master node, standby node, quorum node. The primary and standby nod

[Sorting] Summary of common MongoDB commands Summary of common MongoDB commands Simple addition, deletion, modification, and query dataSpecify whether to display or not to display a field in the query result. For example, we want to search for all the data in the lessons collection, but do not want to include th

"); Comparison between mongodb and mysql commands Traditional relational databases are generally composed of three levels: database, table, and record. MongoDB is composed of databases and collections) and document objects. MongoDB has no concept of columns, rows, and links for tables in relational databases, which

// 启动服务> net start MongoDBState Monitoring Static statisticsDb.stats ()// 查看单个数据库状态> db.stats()statsRelatively simple, you can refer to the db.stats () articleDb.serverstatus ()// 查看整个mongodb的状态// 进入admin集合> mongo 127.0.0.1:2222/admin// 查看状态> db.serverStatus()serverStatusA lot of parameters, you can refer to the Db.serverstatus () articleReal-time statistics> mongostat --port 2222Security CertificationsTodoA little complicated, lazy, reference safety

is another way to handle aggregation calculations; Map-reduce typically has two stages: one stage is to process a single document, and the other is to return one or more objects to the next document processing method; The amount of ..... Well, in short, it's the reduce document result set, summarized by the reduce function; Reduce don't need me to explain it. Map-reduce uses idiomatic JavaScript operations for map and reduce operations, so map-reduce flexibility and complexity can be higher tha

MongoDB has been used recently in new projects, so it took some time to learn a bit. This article to their own study to make a summary, intends to use this article as an API in the future, but also to some ready to learn the small partners, hoping to help you.Date:2018-04-25 20:49:12MongoDB Common Commands MongoDB has been used recently in new projects, so it too

Tags: alt server connect str file--Success Path definition1. Installation Download and install, note the installation method is custom, path customization (D:\CHENGXU\MONGODB), after the installation is successful and then the new Data folder (within the new DB folder) and Logs folder (inside new Mongodb.log file) under the MongoDB folder 2. Server-side Connection CMD window, enter "d:\chengxu\

install MongoDB and server-side configuration http://www.linuxidc.com/Linux/2012-08/68196.htm Ubuntu 13.04 under Install MongoDB2.4.3 http://www.linuxidc.com/Linux/2013-05/84227.htm How to create a new database and collection in MongoDB http://www.linuxidc.com/Linux/2013-06/85749.htm MongoDB entry must read (both concept and actual combat) http://www.linuxidc.co

As the company also has several MongoDB database, need to open a certain portion of the permission for external personnel to use, so here to record, only for the needs of friends to use.1. MongoDB Common Commands[[Emailprotected]~]#ps-ef|grepmongod[[emailprotected]~]#mongo --host=127.0.0.1--port=27017MongoDBshellversion:3.2.7connectingto: 127.0.0.1:27017/test>sho

Tags: mongod class upd ups tables Understand log CREATE DATABASE fieldHere's a record of what MongoDB often commands Database relatedCreate a database Use database_name If the database does not exist, create the database, or switch to the specified database. Delete database : Switch to the database you want to delete, execute the command. Db.dropdatabase () View all databases Show DBS Collection relatedVi

command to start the database 1 mongod --dbpath C:\MongoDb\data\db -logpath C:\MongoDB\data\log\mongolog.log Common commands for several databases use DATABASE_NAME // 创建数据库 >db // 检查当前的数据库 mydb >show dbs // 查询数据库列表 local 0.78125GB test 0.