As far as the melatonin, don't waste your money on it, because it doesn't do anything for you. You'd get just as good result, giving your child pieces of candy, or anything edible really, and telling them that it'll help them sleep, and if they believe it will, it might, just like melatonin does.
Ultimately, all of the data is stored in columns, and metadata is required to identify the columns that function as multidimensional objects. In Oracle Database, you can define a logical multidimensional model for relational tables using the OLAP Catalog or AWXML, as described in Chapter 5..2 The Relational Implementation of the Model. The relational implementation of the multidimensional data model is typically a star schema, as shown in Figure 2-2, or a snowflake schema.
A conceptual data model identifies the highest-level relationships between the different entities. Features of conceptual data model include: Â· Includes the important entities and the relationships among them.Â· No attribute is specified. Â· No primary key is specified.n the conceptual data model you worry just about the high level design-what tables should exist, and the connections between them. In this phase you recognize entities in your model, and relationships between them.