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.
Other distributions target specific niches, such as: 1  Routers â for example, targeted by the tiny embedded router distribution OpenWrt. 2  Internet of things â for example, targeted by Ubuntu Core. 3  Home theater PCs â for example, targeted by KnoppMyth, Kodi (former XBMC) and Mythbuntu.