The schema in the figure alsonormalizesthe dimProduct dimension by moving the product type data to a separate table. Some snowflake schemas might also normalize the dimDate dimension, depending on the specific business requirements. Because the snowflake schema normalizes the data, there is less ...
A lakehouse, the convergence of a data warehouse and a data lake, aims to enable data mobility and streamline construction. The key of the lakehouse architecture is to enable the free flow of data/metadata between the data warehouse and the data lake. The explicit-value data in the lake can...
If a conformed dimension is implemented across multiple data marts, the table names can be different, as long as the columns and content are the same. In fact, data marts created in the sameSQLdatabase must often have different names unless they can be logically separated, such as putting t...
In contrast, the structure of a two-tier DWH architecture divides the warehouse's own tangible data sources. Unlike the single-tier architecture, the two-tier architecture has a system and a database server. This is most commonly used in small organizations where a server is used as a data ...
Basics - What is a dimension table Answer posted by Riaz Ahmad on 2005-06-09 14:45:26: A dimensional table is a collection of hierarchies and categories along which the user can drill down and drill up. it contains only the textual attributes.. 9 Answers
Ingestion: Ingestion in the data warehouse is the process of collecting and importing data into the data warehouse through external sources. Data Lake: A data lake is a centralized region wherein large quantities of structured, semi-structured, and unstructured data records are processed, stored, ...
A data warehouse, also commonly known as an online analytical processing system (OLAP), is a repository of data that is extracted, loaded, and transformed (ELT) from one or more operational source system and modeled to enable data analysis and reporting in your business intelligence (BI) tools...
What is Star Schema?A star schema is the elementary form of a dimensional model, in which data are organized into facts and dimensions. A fact is an event that is counted or measured, such as a sale or log in. A dimension includes reference data about the fact, such as date, item, ...
What Is a Dimension Table? A dimension table is the other important component of the star schema data model. It contains descriptive attributes that add context to the quantitative data in the fact table. Each dimension represents a specific attribute or viewpoint from which the data can be ana...
What Md.Rehman is trying to say is catagorizing the SCD which are the Slowly Changing Dimensions which are used to maintain historical data.Dimension:A dimension is an organized hierarchy of categories, known as levels, that describes data in data warehouse fact tables The various types of dim...