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.
Reference data refers to data that is used to categorize other data within enterprise applications and databases. Reference data includes the lookup table and code table data that is found in virtually every enterprise application, such as country codes, currency codes, and industry codes.Reference data is distinct from transactional data and master data.Transactional data is the data that is produced by transactions within applications; master data is the data that represents the key business entities that participate within transactions.eference data is a key aspect of any application integration. Today, many enterprises have no centralized enterprise governance and management over reference data.