Skip to main content

Type 1 Slowly Changing Dimension

In Type 1 Slowly Changing Dimension, the new information simply overwrites the original information. In other words, no history is kept.
In our example, recall we originally have the following table:
Customer Key Name State
1001 Guru Jharkhand

After Guru moved from Jharkhand to Karnataka, the new information replaces the new record, and we have the following table:
Customer Key Name State
1001 Guru Karnataka

Advantages:
- This is the easiest way to handle the Slowly Changing Dimension problem, since there is no need to keep track of the old information.
Disadvantages:
- All history is lost. By applying this methodology, it is not possible to trace back in history. For example, in this case, the company would not be able to know that Christina lived in Illinois before. 
When to use Type 1:
Type 1 slowly changing dimension should be used when it is not necessary for the data warehouse to keep track of historical changes.

Comments

Popular posts from this blog

DataZen Syllabus

INTRODUCTION TO DATAZEN PRODUCT ELEMENTS ARCHITECTURE DATAZEN ENTERPRISE SERVER INTRODUCTION SERVER ARCHITECTURE INSTALLATION SECURITY CONTROL PANEL WEB VIEWER SERVER ADMINISTRATION CREATING AND PUBLISHING DASHBOARDS CONNECTING TO DATASOURCES DESIGNER CONFIGURING NAVIGATOR CONFIGURING VISUALIZATION  PUBLISHING DASHBOARD WORKING WITH MAP  WORKING WITH DRILL THROUGH DASHBOARDS

MS BI Syllabus

Microsoft Business Intelligence Course Syllabus SSRS – SQL Server Reporting Services  Getting Started 1. Understanding Reporting (Authoring,Management,Delivery) 2. Installing Reporting (Native Mode, SharePoint Integration mode) 3. Building your first report  Authoring Reports 1. Developing Basic Reports (RDL,wizard,designer,datasource,dataset,formatting) 2. Working with expressions (expression to calculate value, Agg functions, exp for objects) 3. Organizing Data (Data Regions, Table, Matrix, Chart, List) 4. Advance Report (Parameter, drill down, drill through, links, 5. Report Model (Data Source, Data Source View, Model , Report Builder 3.0)  Managing Report ( Report Manager) 1. Managing Content (deploying report, folders, linked reports, datasources, value etc) 2. Managing Security (Item Level , Site navigation, localhost – sql) 3. Managing Server Config (Config Manager, Report Manager, Report Server DB)  Delivering Report 1. Accessing Report (Viewing...

PowerBI Interview Questions and Answers

Power BI Interview Questions – General Questions 1). What is self-service business intelligence? Ans: Self-Service Business Intelligence (SSBI) is an approach to data analytics that enables business users to filter, segment, and, analyse their data, without the in-depth technical knowledge in statistical analysis, business intelligence (BI). SSBI has made it easier for end users to access their data and create various visuals to get better business insights. Anybody who has basic understanding of the data can create reports to build intuitive and shareable dashboards. 2). What are the parts of Microsoft self-service business intelligence solution? Ans: Microsoft has two parts for Self-Service BI  Excel BI Toolkit – It allows users to create interactive report by importing data from different sources and model data according to report requirement.  Power BI – It is the online solution that enables you to share the interactive reports and queries that you have created using ...