The database commonly uses an index range scan to access selective data. The selectivity is the percentage of rows in the table that the query selects, with 0 meaning no rows and 1 meaning all rows. Selectivity is tied to a query predicate, such as WHERE last_name LIKE 'A%', or a combination of predicates.
Types of Distribution: Intensive, Selective and Exclusive Distribution. Some of the important types of distribution in international market are 1. Intensive 2. Selective and 3. Exclusive distribution.
Probability distributions may be either discrete or continuous. The normal (Gaussian) and Lorentzian distributions are good examples of continuous distributionsâthe random variable can take on any value. Examples of discrete distributions include the Binomial, the Hypergeometric, and the Poisson. We will introduce the binomial today and then focus on the normal distribution.