Question
In a snowflake schema of a data warehouse, which of the
following consequences is most likely as a result of normalization of dimension tables?Solution
A snowflake schema is a variation of a star schema in which the dimension tables are normalized (broken down into related tables). This: • Reduces redundancy (e.g., separating country, state, and city into different tables). • Leads to better storage efficiency. • However, it requires more joins in queries, which can reduce query performance compared to a star schema. • Option A is incorrect because normalization typically increases the number of joins, decreasing performance. • Option C is false; more joins are needed in snowflake schemas. • Option D is incorrect; multiple dimension tables can be used. • Option E is the opposite of what a snowflake schema does (it normalizes, not denormalizes, dimension tables).
Select the option that is related to the third term in the same way as the second term is related to the first term.
ORGANS : SNTZRO : : PARROT : ?
Select the option that is related to the third number in the same way as the second number is related to the first number.
46: 146 :: 65:?
Select the option in which the numbers are related in the same way as are the numbers in the given set.
Given set: (150, 157, 178)
Seven friends, A, B, C, D, E, F and G are sitting in a straight line facing the same direction. E is sitting at one extreme end. E is sitting second to ...
Which letter cluster will complete the given series?
LSKR, JOOT, HKSV, FGWX, DCAZ, ______
Select the set in which the numbers are related in the same way as are the numbers of the given sets. (NOTE : Operations should be performed on the whol...
Select the option that is related to the sixth number in the same way as the first number is related to the second number and the third number is relate...
Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.
<...If 24 @ 6 = 28 and 39 @ 24 = 102, then 22 @ 16 = '?'.
Four of the five among the following are similar in such a way to form a group, which one of the following doesn’t belong to the group?
