scala mongodb tutorial

Dropdatabase () methodThe MongoDB db.dropdatabase () command is used to delete an existing database.Grammar:The basic syntax for the dropdatabase () command is as follows:DB. Dropdatabase() This will delete the selected database. If you have not selected any databases, then it will delete the default ' test ' databaseExample:First, check the list database by using the command show DBS>Show dbslocal 0.78125GB0.23012GB0.23012GB> If you want t

," nmodified ": 1}) 2.3. Deleting documentsMongoDB removes the document from the collection with remove ()FormatDb. Collection_name.remove (Delletion_critteria,justone)Justone if set to TRUE or 1, only one document is deleted.ExampleDelete the document named ' User1 ' before deleting the document that exists in the collection "user" before querying all documents after deletion to determine if the deletion was successful> Db.user.find () {"_id": ObjectId ("58e1d2f0bb1bbc3245fa754b"), "name": "L

Mongodb fuzzy query tutorial, mongodb fuzzy queryUse the RockMongo client tool for fuzzy search {"Content": "$ regex": "123456 "}Fuzzy search in other cases Query contains XXX {Name:/xxx /} Query starts with XXX {Name:/^ xxx /} Query ends with XXX {Name:/xxx ^ /} Case Insensitive Query {Name:/xxx/I} Case-insensitive fuzzy search in Spring // Completely

Linux under the mongodb installation and data import and export tutorial# View linux distributionsCat/etc/issue# View the linux kernel version numberUname-rI,Linux under The general steps of MongoDB installation1. Go to MongoDB 's website (https://www.mongodb.org/downloads) to download the appropriate installation pac

There is no MONGODB test environment can be installed on the local MongoDB service, here is MongoDB in Windows under the text installation tutorial. PHP default does not open the MongoDB extension, you need to manually download the MONGO extension on the official website, f

databasesMongoDB InstallationHere, the main explanation is win under Install, about Linux under installation, then add on.Download URL: Official website (https://www.mongodb.org/downloads/#production)The Win32 is used here.The author downloads The old long time only then finishes, estimated is the personal network speed question,After installation, the following directories are found in the installation directoryConfigure path PATH [OPTIONAL]The path path is configured so that you can enter

Disclaimer: Translation Official documents: http://docs.mongodb.org/master/tutorial/install-mongodb-on-red-hat/?_ga=1.146202678.362433698.1425911361Overview:Learn how to install MongoDB RPM packages under Rhel or CentOS with this tutorial.Packages that need to be installed:MongoDB provides an official support package embedded in its private repository. The wareho

Recently in the study of MongoDB, online search found that the use of MongoDB in. NET article is either an early driver version, or very little information, so write an essay record, this article in detail to introduce to you. NET in the use of MongoDB method tutorial, the need for friends can reference, below to see t

time of the download, there is a rule that even "stable" (for example: 1.6.x,1.8.x), the base is "development" (for example: 1.7.x,1.9.x).2.2 InstallationAfter the download, after decompression, there will be three directories. The bin directory is a program file, and the other two directories are header and library files called by C + +. Here's what some of the program files in the bin directory do: Mongo.exe command-line client Tools Mongod.exe command-line service-side tools Mongodump.exe Da

The Mongodb tutorial series is a distributed file storage-based database. Written in C ++. It is designed to provide scalable, high-performance data storage solutions for WEB applications. MongoDB is a product between relational databases and non-relational databases. It has the most abundant functions and features like relational databases.

Linux under the mongodb installation and data import and export tutorial# View linux release numberCat/etc/issue# View linux kernel versionUname-rI,Linux under The general steps of MongoDB installation1. Download the installation package for your system to the website of MongoDB (https://www.mongodb.org/downloads) C

Java advanced software architect practical video tutorial Spring + Mybatis + SpringMVC + Ehcache + Memcached + Redis + Nginx + Varnish + ActiveMQ + Keepalived + MySQL + MongoDB, keepalived Java high-level software architect Stage 1 video tutorial Thunder downloads Baidu cloud Section 001st: overall course overviewSection 002nd: module-based and project-based Mana

Recent interest in MongoDB, most of the online search is 2.X version, because 2.X and 3.X difference is very large, so their own reference official website, wrote this series. MongoDB knowledge is still a lot of, this series will continue to update, this article as a catalogue, easy to read, there is a problem for everyone to exchange ha. Thank you for your attention, reprint please indicate the source, tha

Tags: blog div nbsp in server https Lin address everyday technologySome time ago, learning about MongoDB, in terms of client tools, the individual thinks that NoSQL Manager for MongoDB is a better experience, the function is also more complete. Unfortunately, when looking for tutorials, found it difficult to find a more detailed tutorial, nor found the Chinese cr

:[Php_mongodb]Extension=php_mongo-1.3.1-5.3-vc9.dllAdd it directly at the end of the file.To create a xxx.php fileWrite the following code:Phpinfo ();?>If the selected version is correct, open the browser to see the following:See this note that your mongodb PHP extension has been installed successfully.4. The specific test code is as follows:CONNECTION=NEWMongo("loCalHosT:27017" ); db=CONNECTION−>DEMO;// selection data base colle= $db->user; Se

bind_ip 0.0.0.0port 27017 if setting master/slave can set the following main configuration sudo./mongod--dbpath/var/lib /mongodb/--logpath/var/log/mongodb/mongodb.log--master--journal--logappend--fork from config sudo./mongod--dbpath/var/ lib/mongodb/--logpath/var/log/mongodb/mongodb.log--slave--logappend--fork--sourc

($where,Array("\ $set" =$newdata));#$set: Make a node equal to a given value, similar to the $pull $pullAll $pop $inc, and slowly explain the usage later/** Result: * Original data * {"_id": ObjectId ("4d635ba2d549a02801000003"), "column_name": "col123", "Column_exp": "Xiaocai"}* was replaced by * {"_id": ObjectId ("4d635ba2d549a02801000003"), "column_name": "col123", "Column_exp": "Ggggggg", "Column_fid": 444}*///* * Replace update, overwrite original record **/$where=Array("column_name" = "co

2 methods for connecting node. js to MongoDB database tutorial, node. jsmongodb Preface The MongoDB Node. js driver is officially supported by the native node. js driver. It is the best implementation so far and has been officially supported by MongoDB. The MongoDB team has

"}}]) $last Gets the final document from the source document according to the grouping. Usually, this makes sense, along with some previous applications such as "$sort"-stage. Db.mycol.aggregate ([{$group: {_id: "$by _user", Last_url: {$last: "$url"}}]) Piping ConceptsThe UNIX command shell pipeline refers to the possibility of some inputs and outputs performing operations as input to the next command. The MongoDB aggr

strength}/mongodb.so 3. Installing the Laravel Extension Download Expansion PacksComposer require Jenssegers/mongodb Registering a service in config/app.phpJenssegersmongodbmongodbserviceprovider::class,Alias ' Mongo ' = Jenssegersmongodbmongodbserviceprovider::class, Modify the database configuration file in config/database.php ' MongoDB ' = [' Driver ' = ' mongodb