What is DWH in data warehousing?

Question

In computing, a data warehouse (DW or DWH), also known as an enterprise data warehouse (EDW), is a system used for reporting and data analysis and is considered a core component of business intelligence. DWs are central repositories of integrated data from one or more disparate sources.

What is DWH in database?

A data warehouse (often abbreviated as DW or DWH) is a central data repository used for reporting and data analysis. It can connect to and integrate multiple data sources to provide a common area to generate business insights.

Is OLAP and DWH same?

The answer is no, they are different. Data warehouse is an archive where historical corporate data is stored and can be analyzed then. It can use different technologies for data extraction and analyzing. And OLAP is one of those technologies that analyze and evaluate data from the data warehouse.

What is star schema in data warehouse with example?

In Star Schema, Business process data, that holds the quantitative data about a business is distributed in fact tables, and dimensions which are descriptive characteristics related to fact data. Sales price, sale quantity, distant, speed, weight, and weight measurements are few examples of fact data in star schema.

Why do we need a DWH?

A data warehouse is a system that stores data from a company's operational databases as well as external sources. Data warehouse platforms are different from operational databases because they store historical information, making it easier for business leaders to analyze data over a specific period of time.

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