Administering Relational Databases on Microsoft Azure Questions and Answers
Question 45
You need to implement the surrogate key for the retail store table. The solution must meet the sales transaction dataset requirements.
What should you create?
Options:
A.
a table that has a FOREIGN KEY constraint
B.
a table the has an IDENTITY property
C.
a user-defined SEQUENCE object
D.
a system-versioned temporal table
Answer:
B
Explanation:
Scenario: Contoso requirements for the sales transaction dataset include:
Implement a surrogate key to account for changes to the retail store addresses.
A surrogate key on a table is a column with a unique identifier for each row. The key is not generated from the
table data. Data modelers like to create surrogate keys on their tables when they design data warehouse models. You can use the IDENTITY property to achieve this goal simply and effectively without affecting load performance.
