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Exam 70-764 All Questions

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Exam 70-764 topic 1 question 290 discussion

Actual exam question from Microsoft's 70-764
Question #: 290
Topic #: 1
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You have a data warehouse that stored sales data. One fact table has 100 million rows.
You must reduce storage needs for the data warehouse.
You need to implement a solution that uses column-based storage and provides real-time analytics for the operational workload.
Solution: You load the data in a heap table.
Does the solution meet the goal?

  • A. Yes
  • B. No
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Suggested Answer: B 🗳️
It is better to use a clustered index.
Columnstore indexes are the standard for storing and querying large data warehousing fact tables. It uses column-based data storage and query processing to achieve up to 10x query performance gains in your data warehouse over traditional row-oriented storage, and up to 10x data compression over the uncompressed data size.
In SQL Server, rowstore refers to table where the underlying data storage format is a heap, a clustered index, or a memory-optimized table.
References: https://docs.microsoft.com/en-us/sql/relational-databases/indexes/columnstore-indexes-overview

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