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Microsoft Exam DP-203 Topic 7 Question 52 Discussion

Actual exam question for Microsoft's DP-203 exam
Question #: 52
Topic #: 7
[All DP-203 Questions]

You are designing a financial transactions table in an Azure Synapse Analytics dedicated SQL pool. The table will have a clustered columnstore index and will include the following columns:

TransactionType: 40 million rows per transaction type

CustomerSegment: 4 million per customer segment

TransactionMonth: 65 million rows per month

AccountType: 500 million per account type

You have the following query requirements:

Analysts will most commonly analyze transactions for a given month.

Transactions analysis will typically summarize transactions by transaction type, customer segment, and/or account type

You need to recommend a partition strategy for the table to minimize query times.

On which column should you recommend partitioning the table?

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Suggested Answer: D

For optimal compression and performance of clustered columnstore tables, a minimum of 1 million rows per distribution and partition is needed. Before partitions are created, dedicated SQL pool already divides each table into 60 distributed databases.

Example: Any partitioning added to a table is in addition to the distributions created behind the scenes. Using this example, if the sales fact table contained 36 monthly partitions, and given that a dedicated SQL pool has 60 distributions, then the sales fact table should contain 60 million rows per month, or 2.1 billion rows when all months are populated. If a table contains fewer than the recommended minimum number of rows per partition, consider using fewer partitions in order to increase the number of rows per partition.


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