Star schema
What is star schema?
A star schema is a type of database schema that is commonly used in data warehouses. It is called a "star schema" because the database is organized in a way that resembles a star, with a central table (the "fact table") surrounded by a number of smaller tables (the "dimension tables").
when
When used star schema is?
The star schema is often used when designing a data warehouse because it can help to improve the performance of queries that are used to analyze the data. It is particularly useful when the data being analyzed is large and complex, and when there are many different dimensions that need to be taken into account.
where
Where is used star schema?
Star schema is used in the design of data warehouses, which are used to store and analyze large amounts of data. It is not typically used in transactional databases, which are used to store data that is accessed and updated frequently.
who
Who are the star schema users ?
The star schema is often used by data architects, database designers, and other professionals who are responsible for designing and implementing data warehouses. It is also used by data analysts and business intelligence professionals who use the data warehouse to analyze data and generate insights.
why
Why star schema is used ?
Star schema is used because it can improve the performance of queries that are used to analyze data in a data warehouse. It does this by organizing the data in a way that makes it easier to access and join the data from different tables. The star schema also makes it easier to understand the structure of the data and the relationships between different data elements.
how
How star schema is ?
To implement a star schema in a data warehouse, the data is typically organized into a central fact table and a number of smaller dimension tables. The fact table contains the data that is being analyzed, and the dimension tables contain information about the context in which the data was collected (such as time, location, product, etc.). The dimension tables are linked to the fact table using foreign keys, which allows the data to be joined and analyzed in different ways.
How many
How many dimension tables are in the star schema?
There is no fixed number of dimension tables in a star schema. The number of dimension tables will depend on the complexity of the data and the number of dimensions that need to be taken into account when analyzing the data. Top of Form
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