Question

In which scenario is the "destructive merge" mode applicable when applying data to a data warehouse table?

a.

Type 1 slowly changing dimensions

b.

Incremental loads

c.

Initial loads

d.

Full refreshes

Posted under Data Warehousing and OLAP

Answer: (a).Type 1 slowly changing dimensions Explanation:The "destructive merge" mode is applicable when applying data to a data warehouse table in scenarios like Type 1 slowly changing dimensions where the existing record must be replaced by the corrected incoming record.

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. In which scenario is the "destructive merge" mode applicable when applying data to a data warehouse table?

Add Comment

Similar Questions

Discover Related MCQs

Q. How are full refreshes different from initial loads in terms of data application modes?

View solution

Q. What are the two methods for maintaining a data warehouse and keeping it up to date after the initial load?

View solution

Q. When might a full refresh be a better option than an update for keeping a data warehouse up to date?

View solution

Q. What is the primary reason for converting production system keys to system-generated keys in the data warehouse?

View solution

Q. What is the key of the fact table in a data warehouse based on?

View solution

Q. What is the primary function of ETL (Extraction, Transformation, and Loading) in a data warehouse?

View solution

Q. Why is data extraction for a data warehouse an ongoing function carried out at very frequent intervals?

View solution

Q. What is the key difference between data loading in a data warehouse and data loading for a new operational system?

View solution

Q. What role do vendor tools play in the ETL process for data warehousing?

View solution

Q. What are the three main components of the ETL process?

View solution

Q. Why is data transformation in a data warehouse more complex than conversion functions for operational systems?

View solution

Q. When might a full refresh be used for data loading in a data warehouse?

View solution

Q. Why is ongoing data extraction required in a data warehouse?

View solution

Q. What is the primary role of data transformation in a data warehouse?

View solution

Q. What is the ETL process, and why is it critical for data warehousing?

View solution

Q. Which of the following ETL tool categories offers maximum flexibility for data transformations, full loads, and incremental loads?

View solution

Q. What is the primary source of data captured through replication in ETL tools?

View solution

Q. What is the primary role of code generators in ETL?

View solution

Q. Which ETL tool option is offered by several DBMS vendors at little or no extra cost, making it attractive to many organizations?

View solution

Q. What are some of the common features or capabilities provided by ETL tools?

View solution

View All MCQs on Data Warehousing and OLAP

Suggested Topics

Are you eager to expand your knowledge beyond Data Warehousing and OLAP? We've curated a selection of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!

Data Structures and Algorithms

Journey through the fundamentals of Data Structures and Algorithms with our extensive...

Cryptography and Network Security

Secure your knowledge of information security with our Cryptography and Network...

Systems Analysis and Design Methods

Get familiar with the process of designing and improving business systems with our...

Discrete Mathematics

Refine your mathematical skills essential for computer science with our Discrete...

Cloud Computing

Stay on top of the biggest trend in IT with our Cloud Computing MCQs. These questions...

Digital Image Processing (DIP)

Delve into the techniques of enhancing digital images with our Digital Image...

Data Warehousing and OLAP

Strengthen your knowledge of Data Warehousing and OLAP with our specialized MCQs....

IT Fundamentals

Navigate the basics of information technology with our IT Fundamentals MCQs. Get a...

Wireless and Mobile Communications

Get to grips with modern communication technologies with our Wireless and Mobile...