data modeling techniques for data warehousing

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

the MySQL Workbench modeling and development of dataBasic informationOriginal title: MySQL workbench:data Modeling DevelopmentOriginal publishing house: Mcgraw-hill Osborne Media(Mei) McLaughlin (McLaughlin, M.)Translator: Zhang June WenPublishing house: Tsinghua University Pressisbn:9787302363712Last Date: 2014-6-5Publication date: June 2014Folio: 16 OpenPage: 368Edition: 1-1Category: Computers > Database

Parse the Data Modeling Method in AngularJS framework, angularjs framework As we know, AngularJS does not come with other available data modeling solutions. In a rather abstract way, we can use JSON data as the model in the controller. However, as time passes and projects gr

representation of the name of the navigation property that contains the collection in the plural form. When you right-click on the entity to view his properties, you will see that the entity set name for each entity is also in the plural form. For example, the entity set name for the poem entity is poems. This automatically adds complex numbers to the benefit, tick the check box on the single plural form that determines the name of the generated object. Tick the Include Foreign key column check

Data modeling of Enterprise Architect 8 (CREATE TABLE) ---------- 1. We create a view of the database modeling 1.1 The New Diagram window, select Extended on the left select from and select data types in the right diagram modeling. 1.2 Open the Diagram window, you can choose

Recently, I saw an article in my blog "converting the Document Forwarding process custom data modeling. I am going to raise this topic for discussion and discussion, with the main purpose of improving. My general requirements are as follows: Developing a complex enterprise multi-user management information system (MIS) does not involve the development of functions such as

Qlikview Data Modeling --- Concatenation, qlikviewThis Blog introduces how to avoid loops and synthetic keys through Concatenation (Concatenation) fact tables:The Modeling in Qlikview is usually very simple. Generally, we only need to rename the names of some sub-segments to prevent or establish automatic association between tables.But sometimes we can't solve th

This Blog introduces how to avoid loops and synthetic keys through Concatenation (Concatenation) fact tables:The modeling in Qlikview is usually very simple. Generally, we only need to rename the names of some sub-segments to prevent or establish automatic association between tables.But sometimes we can't solve the problem by simply renaming it. For example, we have multiple fact tables and multiple associations with other tables, which usually pr

. For example: a part of a process requires the financial controller for approval, the future financial controller substitution, the process should not be affected. Also, a link in the process may be approved by any one of the departments, or all of the department's personnel will be required to approve it. 2 in the process of transfer, approval of documents generally divided into documents and forms 2 kinds of formats. File format documents should support batch processing, that is, you can for

Introduction: The first two blog posts (Database DesignStep by step (5)-understand user requirements and database designIn step by step (6) -- extract business rules), we analyze database requirements, focusing on two topics: 1. understanding user requirements; 2. Extracting business rules. After the requirement analysis is complete, we will enter the conceptual data modeling stage. This article uses the "B

"Stove-refining AI" machine learning 045-Modeling of stock data by hidden Markov model(Python libraries and version numbers used in this article: Python 3.6, Numpy 1.14, Scikit-learn 0.19, matplotlib 2.2)Stock data is very very typical timing data, the data are arranged by d

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

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this chapter, we will introduce the main content of feature engineering, focusing on the main content of data cleansing and data feature preprocessing, including data cleansing, feature acquisition, feature processing (include pointing, normalization, normalization, etc.), feature dimensionality reduction and feature derivation. The quality of pretreatment direc

Datauml Design is a perpetual free software for developers, improving the efficiency of software development and the specification of code. It mainly includes three functions, data model, code generation and UML modeling, the data model function is similar to PowerDesigner software, code generation is similar to soft code generator. 1. What is DATAUML DesignDATAU

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 modeling