MGT245 Chapter 6: Building Foundations and Creating Data Marts
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Questions and Answers

How are dimensions at the lowest level of the hierarchies organized in a star schema?

  • All dimensions are stored in the same table (correct)
  • Each dimension is placed in a separate table
  • Dimensions are compressed to save space
  • Dimensions are linked together with foreign key relationships

    • What is the main difference between a star schema and a snowflake schema?

  • The way data is queried from the database
  • The way dimensions are organized in the schema (correct)
  • The number of tables used to store data
  • The type of compression used to store data

    • What is the purpose of table compression in a relational data warehouse?

  • To improve data security
  • To reduce the size of fact tables
  • To make more efficient use of disk space (correct)
  • To improve query performance

    • What is a benefit of table compression in SQL Server 2008?

    <p>It makes more efficient use of disk space</p> Signup and view all the answers

    How many types of table compression are offered by SQL Server 2008?

    <p>Two</p> Signup and view all the answers

    What is the difference between Row compression and Page compression?

    <p>Row compression reduces the space required to store a row of data, while Page compression reduces the space required to store a page of data</p> Signup and view all the answers

    What happens to the structure of a table when table compression is applied?

    <p>The structure of the table remains unchanged</p> Signup and view all the answers

    How does table compression affect the syntax used to query a table?

    <p>The syntax remains unchanged</p> Signup and view all the answers

    What is the main advantage of using table compression in a relational data warehouse?

    <p>More efficient use of disk space</p> Signup and view all the answers

    Why is table compression important in a relational data warehouse?

    <p>To manage large amounts of data</p> Signup and view all the answers

    What is the main difference between a relational data warehouse and a traditional database?

    <p>The amount of data stored</p> Signup and view all the answers

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