-------What are the Adv of Star Schema and Snow Flake
Schema?
- 4 Answers
- 11908 Views
- Bank Of America, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / krishnakumari
Star Schema:
Definition: The star schema is the simplest data warehouse
schema. It is called a star schema because the diagram
resembles a star with points radiating from a center.
A single Fact table (center of the star) surrounded by
multiple dimensional tables(the points of the star).
Advantages:
Simplest DW schema
Easy to understand
Easy to Navigate between the tables due to less number of
joins.
Most suitable for Query processing
Disadvantages:
Occupies more space
Highly Denormalized
Snowflake schema:
Definition: A Snowflake schema is a Data warehouse Schema
which consists of a single Fact table and multiple
dimensional tables. These Dimensional tables are
normalized.A variant of the star schema where each
dimension can have its own dimensions.
Advantages:
These tables are easier to maintain
Saves the storage space.
Disadvantages:
Due to large number of joins it is complex to navigate
Starflake schema - Hybrid structure that contains a mixture
of (denormalized) STAR and (normalized) SNOWFLAKE schemas
| Is This Answer Correct ? | 10 Yes | 3 No |
Answer / harini
Better understanding of data is the main advantage of stake
flow schema in dw
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / vishwamitra
# 1 StarSchema Advantage: Slicing down,performance increase
and
easy to understand the data.
# 2 Star Schema:
Definition: The star schema is the simplest data warehouse
schema. It is called a star schema because the diagram
resembles a star with points radiating from a center.
A single Fact table (center of the star) surrounded by
multiple dimensional tables(the points of the star).
Advantages:
Simplest DW schema
Easy to understand
Easy to Navigate between the tables due to less number of
joins.
Most suitable for Query processing
Disadvantages:
Occupies more space
Highly Denormalized
Snowflake schema:
Definition: A Snowflake schema is a Data warehouse Schema
which consists of a single Fact table and multiple
dimensional tables. These Dimensional tables are
normalized.A variant of the star schema where each
dimension can have its own dimensions.
Advantages:
These tables are easier to maintain
Saves the storage space.
Disadvantages:
Due to large number of joins it is complex to navigate
Starflake schema - Hybrid structure that contains a mixture
of (denormalized) STAR and (normalized) SNOWFLAKE schemas
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / amp mohan
StarSchema Advantage: Slicing down,performance increase and
easy to understand the data.
| Is This Answer Correct ? | 3 Yes | 8 No |
Difference betwween cognos report net architecture and cognos8 architecture
What are the Ways to Import Data into Catalong?
Why cognos decision stream is used?
What are the different types of OLAP. Which one is Cognos Powercube?
In which type of report we can create school time table in cognos? [I want period numbers in rows like period 1, Period 2, period 3, period 4, period 5 and class numbers in columns like 8th class, 9th class, 10th class and subject names in cells] Genelally school time table is prepared in crosstab report, but subject names are not measures and a crosstab cell can not contain non-measures. This is my problem,,,,,
Can anyone tell me the step by step process how to connect cognos to oracle?
plz anybody help me, how many reports we can create in one project?, and what are the names?in real time project at first what we will do?
hi this is bhaskar iam working in Tcs u want any real time faqs send me your qs i will ans that qs ok this is my id bhaskarparitala.rao@gmail.com
can we insert list report in corsstab report?
------------- How to identify the Revenue Column in Report?
How can I schedule reports in cognos?
--------------Explain Table of contents?
Teradata 
