mongodb data modeling tool

this scenario, users can comment on images, articles, and other resources. All comments are included in the comment set. If you only use Manual References, I cannot tell which type of resources the comment belongs to, pictures? Article ?. So we have DBRef. DBRefFormat: {$ ref: , $ Id: , $ Db: } $ Ref: Set Name; $ id: referenced id; $ db: Database Name; optional parameter. It can be seen that the structure of DBRef is more complex than that of Manual References, which occupies a l

MongoDB Data Link Modeling The data in MongoDB is very flexible, and the collection does not require a uniform structure for documents. However, seriously considering the data model is still very important, because it will affect

MongoDB Common Data Modeling method: 1) Document relationship modeling, 2) tree structure modeling Model:|--1, document relationship modeling| |--1) Embedded document model| |--2) Embedded document model|--2, tree structure

", founded:1980, location: "CA" } { _id:123456789, title: "MongoDB: The definitive guide, author: ["Kristina Chodorow", "Mike Dirolf"], published_ Date:isodate ("2010-09-24"), pages:216, language: "中文版", publisher_id: "OReilly" } { _id:234567890, title: "Tips and Tricks for MongoDB Developer ", author:" Kristina chodorow ", published_date: Isodate ("2011-05-06"),

IntroductionThe evaluation of several modeling tools was highlighted in the previous blog, and SQL Power architect was selected as the final modeling tool, and the Oracle Data Modeler support Vertica was also studied during the evaluation process, although the eventual abandonment of Oracle

article information, first in the Post collection to find out the article, and then in the user collection to find out all the users information. But if there is such a scene: Users can comment on pictures, articles and other resources, all the comments are placed in the comment collection, if you just use manual References, it is not clear what kind of resources the comment is, picture? Article?. So with the dbref.form of Dbref:{$ref: $ref: Collection name; $id: Reference ID; $db: database nam

Due to the need to record increasingly complex data warehouse implementations, IT staff in the U.S. Omaha Public Power Division had to purchase a new set of graphical data modeling tools, but it was almost impossible to obtain approval from the parent company for the project. The utilities were responsible for providing electricity to most of the Nebraska State,

Tags: des c a file data usageToday, we are prepared to further refine the functionality and make it more automated, based on the gadget model_sql written @zhangkai05. Convenient for modeling personnel to develop ETL tasks.After the source code changes, it is published to Git (URL address) and is gradually perfected.Describe the status quo and problemsTeam Data Wa

Tags: format composite need to import collection data export God nbsp Share picture, two tools are located in the bin directory of the MongoDB installation directory　　　　Here's how they are used:OneExport Tool MongoexportThe Mongoexport tool in MongoDB can export a collection

A tool for real-time data synchronization between mongodb and ElasticSearch Based on netcore (ipv2es ), Tools for real-time data synchronization between mongodb and ElasticSearch Based on netcore One-to-one, one-to-many, multiple-to-one, and many-to-many

building a data warehouse, we can summarize a set of modeling methods suitable for ourselves, which can help customers better play the role of data warehouse.The main line of this article is to answer the following three questions: What is a data model? Why do we need a

main line of this article is to answer the following three questions: What is a data model? Why do we need a data model? How to build a data model Finally, we will introduce a specific data warehouse modeling example at the end of this article to help you understand th

Label:Recently we need to the MongoDB and Postgres database operations more frequently, to recommend a data processing tool kettle, I hope you can help① the tables in the MongoDB database and then export them to generate the Csv,txt,excel format, as well as importing the tables into other

invalid, only the entire database can be synchronizedThis bug1.0.3 does not exist before. It appears after 1.4.0 modification. CHANGE Part The incremental synchronization parameter is changed from millisecond to second (All Versions earlier than 1.6.0 are milliseconds ); Improve the incremental synchronization progress display (Other unchanged) in real-time synchronization, remove the progress bar, instead of displaying the oplog lag time. Recovery parameter -- tu, -- tp, that is, specify

: Key-Value storage: Oracle Coherence,redis,kyoto Cabinet BigTable-style database: Apache hbase,apache Cassandra Document database: MONGODB,COUCHDB Full-Text search engine: Apache lucene,apache SOLR Graphics database: NEO4J,FLOCKDB 4. Conceptual Technology This section specifically describes the basic principles of NOSQL data modeling. 1, to standardize (denormal

Mongoexport command can also be manipulated using the /uri option , which can be manipulated against the use of Help.d:\ws\mdb_backup>Mongoexport/ u Reporter/ p 111111 /authenticationdatabase Globalnews/ D globalnews/news/ o 0713_news_bck.json 2018-07-13t16:36:31.977+0800 Connected To:localhost2018-07-13t16:36:32.046+0800 exported 363 RecordsExported data file: The default is in JSON format, or it can be stored in CSV format or other (even customiza

/mongodb/ Mongodb-schema-design-richard-kreuters-mongo-berlin-preso http://www.michaelhamrah.com/blog/2011/08/ data-modeling-at-scale-mongodb-mongoid-callbacks-and-denormalizing-data-for-efficiency/ http// seancribb

Definition: divides an application into many small pieces (objects) using the object-oriented method. These objects are independent and then combine these objects to create programs. Features: packaging, inheritance, and polymorphism. Commonly used modeling tools: playcase, Rational Rose, Computer Association bpwin, Computer Association Erwin, oracle designer/2000, Sybase powerdesigner UML language Overview Definition: a unified object-oriented

lucky, everyone can win at the end of the game. Chapter 3: ensuring high-quality DefinitionsThis chapter focuses on a tool called the definition checklist, which includes guidelines to ensure that the defined quality is at the highest level. Chapter 4: project plans of Data modelersThis chapter focuses on four tools for determining the data

Data Warehouse is the "heart". Chapter II: Metadata Bingo Game In simple terms, that is, through the bingo card game, to motivate the project team members to determine the data model and determine the effectiveness of the metadata. The Meta Data Bingo game emphasizes "total win", and if you're lucky, everyone wins at the end of the game. Chapter III: Ensuring