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The snowflake schema is in the same family as the star schema logical model. In fact, the star schema is considered a special case of the snowflake schema. The snowflake schema provides some advantages over the star schema in certain situations, including: Some OLAP multidimensional database modeling tools are optimized for snowflake schemas. [3]
A common reply against the SNOWFLAKE criterion is that professional reviewers (of electronics, restaurants, travel guides...) do routinely write this kind of content, and this makes the source somehow non-reliable or the item non-notable. If that argument were true, we couldn't have many scientific, mathematic or history articles, since ...
Everyone knows that this speck exists. It isn't notable just because it exists. It is notable because plenty of reliable sources have commented on it. Please follow the notability guidelines and make sure they are verifiable. "It is not a hoax. There is plenty of proof that it exists. It had its picture in three local websites.
In cases such as these, an "other stuff exists"–type of argument or rationale may provide the necessary precedent for style and phraseology. For instance, upon the sudden death of the actor Heath Ledger in 2008, a discussion broke out about adding "the late" before his name in the article on The Dark Knight , a film in which he had a major role.
Consider a database of sales, perhaps from a store chain, classified by date, store and product. The image of the schema to the right is a star schema version of the sample schema provided in the snowflake schema article. Fact_Sales is the fact table and there are three dimension tables Dim_Date, Dim_Store and Dim_Product.
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Macro photography of a natural snowflake. A snowflake is a single ice crystal that is large enough to fall through the Earth's atmosphere as snow. [1] [2] [3] Snow appears white in color despite being made of clear ice. This is because the many small crystal facets of the snowflakes scatter the sunlight between them. [4]
In the context of Oracle Databases, a schema object is a logical data storage structure. [4]An Oracle database associates a separate schema with each database user. [5] A schema comprises a collection of schema objects.