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.
Data distributions are used to organize and display information about a set of collected data. Common distributions include tally charts, dot plots, box plots, and histograms. Selecting an appropriate distribution will depend on the type and amount of data that will be displayed since each distribution has different strengths and weaknesses.