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.
For this simple example, the distribution of pool balls and the sampling. distribution are both discrete distributions. The pool balls have only the values 1, 2, and 3, and a sample mean can have one of only ï¬ve values shown in Table 2. There is an alternative way of conceptualizing a sampling distribution that.