define null valuesin some cases a certain entity
Define null values.
In some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for a certain entity. In these cases null value is used.
Expected delivery within 24 Hours
what are stored and derived attributesstored attributes the attributes keeps in a data base are known as stored attributesderived attributes the
q how does the excretory system of nematodes workthe metabolic residuals of nematodes are together by two longitudinal lateral excretory channels
what are composite attributescomposite attributes can be separated in to sub
q how is the nervous system of nematodes organized where are the neural chords located in their bodyroundworms have a ganglial nervous system with an
define null valuesin some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for
q what is the kind of reproduction that occurs in roundworms what usual feature do nematode sperm cells havenematodes reproduce sexually the nematode
q what are the major human diseases caused by roundwormsthe major human diseases caused by nematodes are ancylostomiasis ascariasis hookworm
explain roughness width and roughness width cut offroughness width - roughness width is the distance parallel to the normal surface between
define the terms i entity type ii entity setentity type an entity type describes a collection of entities that have the similar attributesentity set
1940739
Questions Asked
3,689
Active Tutors
1445503
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Question 1: Describe how natural selection is part of population genetics among the Southwestern Athabaskan Amerindians
Keegan, an 8 -year-old, no longer thinks a row of pennies in front of him contains more pennies than a row of the same number of pennies
Humans, horses, porpoises, and bats all have very different forelimbs, but the bones inside them show similar shapes, positions, and development,
Question: In addition to natural selection, four other forces can drive evolutionary change. Which of these is NOT one of them?
Question: Which of these are pre-zygotic isolating mechanisms? (Select all that apply.)
Question: According to the reading, how many recognized fuel models are used for fire behavior (documented by Albini 1976)?
Question: Which of the following could explain why a particular prey item was captured/consumed at a higher rate?