The entity integrity rule states that a primary key attribute can be null. Thus the statement is false.
<h3>What is an entity?</h3>
An entity is refer to any object that exists in reality. These entities are Independent in nature. Each row in a table should be a distinct entity, which is ensured by entity integrity.
The entity integrity rule states that a primary key attribute can not be null as it shows unique characteristics of an entity.No primary key value can be null according to the entity integrity constraint because it is needed to identify specific attribute values in relation.
Therefore, the statement is False.
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The answer is "You still might want to determine if there are any barriers to performance."
Performance gap refers to the difference between the present circumstance and the expected circumstance. Execution hole investigation enables a business to recognize how far it has come toward achieving its objectives and how far despite everything it needs to go to accomplish them, with the target of building up a solid procedure to close any current gap.
Answer:
The factors that can create differences in perception can arise from the perceiver, like his attitude, motive, past experiences, education, and even faith. Factors produced by the target could be being a novelty, its sound, or size. The Situation can also create factors that affect perception, such as time and context.
Explanation:
Although everybody might have a different perception of reality, the reality remains the same. What we perceive as reality is not reality itself, but a constructed idea based on the aforementioned factors that become our reality. Our perceptions do reflect reality, but reality can be interpreted in as many ways as people are in the world, so we can´t expect our reality to be the only one.
Answer:
There were an estimated 18 million Native Americans living north of Mexico at the beginning of the European invasion. Prior to the arrival of the Europeans, American Indians were remarkably free of serious diseases. People did not often die from diseases. As the European explorers and colonists began to arrive, this changed and the consequences were disastrous for Native American people. The death tolls from the newly introduced European diseases often reached 80-90 percent. Entire groups of people vanished before the tidal wave of disease.
Explanation:
The diseases brought to this continent by the Europeans included bubonic plague, chicken pox, pneumonic plague, cholera, diphtheria, influenza, measles, scarlet fever, smallpox, typhus, tuberculosis, and whooping cough. The diseases introduced in the Americas by the Europeans were crowd diseases: that is, individuals who have once contracted the disease and survived become immune to the disease. In a small population, the disease will become extinct. Measles, for instance, requires a population of about 300,000 to survive. If the population size drops below this threshold, the virus can cause illness and death, but after one epidemic, the virus itself dies out.
Another important factor in the European diseases was the presence of domesticated animals. The source of many of the infections was the domesticated animals which lived in close proximity with the humans.
Overall, hundreds of thousands of Indians died of European diseases during the first two centuries following contact. In terms of death tolls, smallpox killed the greatest number of Indians, followed by measles, influenza, and bubonic plague.
Federalist no. 10 is an essay that James Madison as the 10th as the Federalist Papers, a series of essays initiated by Alexander Hamilton
