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.
ASP: Multidimensional Arrays. Arrays do not have to be a simple list of keys and values; each location in the array can hold another array. This way, you can create a multi-dimensional array. The reason you may use this type of array is when you have records of each item. For example, car, year, price,... and you want display one record at a time. The most commonly used are two-dimensional arrays.