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.
What is Uniform Distribution? Uniform distribution is a statistical distribution in which every possible outcome has an equal chance, or likelihood, of occurring (1 out of the total number of outcomes). For example, imagine a man standing on a street corner handing a $50 bill to a lucky passerby.