Monday 29 October 2018

ABOUT SCHEMA.ORG

     


                               WHAT IS SCHEMA.ORG
  SCHEMA.ORG   Schema is a semantic vocabulary of tags (or)  microdata that you can add to your HTML to improve the way of  search engines and represent your page in SERP    




USE OF SCHEMA.ORG

Schema is a joint effort in the spirit of sitemaps.org to improve the web by creating a structured data markup helps search engine understand the information on the web pages and provide richer search results
What are the advantages of snowflake schema?
                                                                                                              
    The advantage of snowflake schema is that the normalized tables r easier to maintain.it also saves the storage space. The disadvantage of snowflake schema is that it reduces the effectiveness of navigation across the tables due to large no of joins between them.

There are two main advantages to the snowflake schema: Better data quality (data is more structured, so data integrity problems are reduced) Less disk space is used the denormalized model.


Which is better star schema or snowflake?

    The Snowflake Schema. ... The fact table has the same dimensions as it does in  the star schema example. The most important difference is that the dimension tables in the snowflake schema are normalized. Interestingly, the process of normalizing dimension tables is called snowflaking.


What is star and snowflake schema?

star schema model can be depicted as a simple star: a central table contains fact data and multiple tables radiate out from it, connected by the primary and foreign keys of the database. ... In a snowflake schema implementation, Warehouse Builder uses more than one table or view to store the dimension data.


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