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hi

can anyone help me to find out the difference between the STAR SCHEMA and SNOWFLAKE SCHEMA.

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ecolomer
Master II
Master II

7 Replies
ecolomer
Master II
Master II

ecolomer
Master II
Master II

ashfaq_haseeb
Champion III
Champion III

sujeetsingh
Master III
Master III

Marco, it is like you have given a lots of link for the concept..

Well go for the Ralph Kimbel data ware housing concepts.

It is the Black book for all such concepts.

SunilChauhan
Champion II
Champion II

snow flake                                                                star         

1.Normalize                                                              denormalized

2.fact-> dimension-> dimension                              fact-> dimension (centralized fact)

3.when select to find result                                         when select to find take shortest path( retrival faster)

     may take more time( comparatively slow

     retrieval)

4. more Ram Consumption                                        comparative less Ram

5. No duplicates                                                      duplicated data posiblility as merging tables

6. query response time is more                                  comparitavely less

7.  good for transaction dbs                                       Good for BI (where only select impressions)

Sunil Chauhan
Not applicable
Author

Please search in Google, you will enough material.

Hope by above answers your query is sorted.


Thanks!