70-463 Exam Dumps | You are creating a SQL Server Integration Services (SSIS) package that implements a Type 3 Slowly Changing

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Question 115/145

You are creating a SQL Server Integration Services (SSIS) package that implements a Type 3 Slowly Changing Dimension (SCD).
You need to add a task or component to the package that allows you to implement the SCD logic.
What should you use?

A. an Execute SQL task that executes a MERGE statement on the database

B. an Aggregate component

C. a Merge Join component

D. a Data Conversion component

Correct Answer: C

Explanation/Reference:
Explanation:
Type of Slowly Changing DimensionsSlowly Changing Dimensions are categorized into three types named: Type 1, Type 2, and Type3. The Type 1 SCD does not maintain the history of changing attributes, it overwrites values of the attributes. Type 2 maintains historical values for changing attributes. Type 3 that we do not use much maintains separate columns for changed attributes. SSIS SCD wizard supports both Type 1 and Type 2.
Using MERGE instead of SCD wizardReplacement of SCD wizard with MERGE is not a straightforward technique. If the SCD has both Type 1 and Type 2 types attributes, they need to be handled separately.
References: https://docs.microsoft.com/en-us/sql/integration-services/data-flow/transformations/slowly- changing-dimension-transformation?view=sql-server-2017

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