Note: This question is part of a series of questions that use the same set of answer choices.
An answer choice may be correct for more than one question in the series.
You are designing a SQL Server Analysis Services (SSAS) cube.
You need to create a measure to count unique customers.
What should you do?
A.
Add a hidden measure that uses the Sum aggregate function. Add a calculated measure aggregating the
measure along the time dimension.
B.
Create a dimension. Then add a cube dimension andlink it several times to the measure group.
C.
Create several dimensions. Add each dimension to the cube.
D.
Create a dimension with one attribute hierarchy. Set the IsAggregatable property to False and then set the
DefaultMember property. Use a regular relationship between the dimension and measure group.
E.
Create a new named calculation in the data sourceview to calculate a rolling sum. Add a measure that uses
the Max aggregate function based on the named calculation.
F.
Add a calculated measure based on an expression that counts members filtered by the Exists and
NonEmpty functions.
G.
Create a dimension. Create regular relationships between the cube dimension and the measure group.
Configure the relationships to use different dimension attributes.
H.
Add a measure that uses the Count aggregate function to an existing measure group. I. Use the Business
Intelligence Wizard to define dimension intelligence.
I.
Add a measure group that has one measure that uses the DistinctCount aggregate function.
J.
Add a measure that uses the LastNonEmpty aggregate function. Use a regular relationship between the
time dimension and the measure group.
K.
Create a dimension with one attribute hierarchy. Set the ValueColumn property, set the IsAggregatable
property to False, and then set the DefaultMember property. Configure the cube dimension so that it does
not have a relationship with the measure group. Adda calculated measure that uses the MemberValue
attribute property.
L. Create a dimension with one attribute hierarchy. Set the IsAggregatable property to False and then set the
DefaultMember property. Use a many-to-many relationship to link the dimension to the measure group.
M. Use role playing dimensions.
N. Add a measure that uses the DistinctCount aggregate function to an existing measure group.
The correct answer is:
N. Add a measure that uses the DistinctCount aggregate function to an existing measure group.
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D. Excellent process, cheers
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Anyway, (I) is the right answer. It is recommended to create a new measure group for measures that use distinct count aggregate function. This will increase query performance. Not sure about 2012, but SQL-Server 2014 creates a new measure group automatically if you choose distinct count aggregation for a new measure.
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+1 – you are right!
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Alex is right.
A distinct count measure is always placed in a dedicated measure group
https://msdn.microsoft.com/en-us/library/ms365396.aspx
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