Which type of table should you use?

You plan to create a dimension table in Azure Data Warehouse that will be less than 1 GB.

You need to create the table to meet the following requirements:

– Provide the fastest query time.

– Minimize data movement.

Which type of table should you use?
A . hash distributed
B . heap
C . replicated
D . round-robin

View Answer

Answer: D

Explanation:

Usually common dimension tables or tables that doesn’t distribute evenly are good candidates for round-robin distributed table.

Note: Dimension tables or other lookup tables in a schema can usually be stored as round-robin tables. Usually these tables connect to more than one fact tables and optimizing for one join may not be the best idea. Also usually dimension tables are smaller which can leave some distributions empty when hash distributed. Round-robin by definition guarantees a uniform data distribution.

References: https://blogs.msdn.microsoft.com/sqlcat/2015/08/11/choosing-hash-distributed-table-vs-round-robin­distributed-table-in-azure-sql-dw-service/