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.
Types of data collection tools. Quantitative data can be collected using four main types of surveys: Census. data collection about every unit in a group or population, e.g. if a VET provider collects data about the age of trainees in a class, that would be considered a âclass censusâ. Sample Survey: