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 related word/letters/number from the given alternatives.
CF : JM :: QT : ?
Select the option that is related to the third number in the same way as the second number is related to the first number.
55 : 86 :: 37 : ?
Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is relat...
If 12 $ 18 = 10, 15 $ 18 = 11 then what is the value of 32 $ 22 = ?
Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is rela...
Four number-pairs are given, out of which three are alike in a certain manner and one is different. Choose the different number pair.
Select the option that is related to fifth letter cluster in the same way as the second - letter cluster is related to the first letter- cluster and the...
Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related t...
Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and th...
Select the option in which the numbers are not related in the same way as are the number of the following set.
(5, 11, 165)