A. they are a source of calcium
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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Same-> they had very little food, it was extremly cold in the winter, and thay hade to build everything by themselves.
Sociologist Pierre Bourdieu found that the perceptual schemes people draw upon are shaped in large part by their <u>social class position</u>
<h3>Who is Pierre Bourdieu?</h3>
Sociologist and public intellectual Pierre Bourdieu was from France. In a number of linked academic domains, Bourdieu's contributions to sociology of education, sociological theory, and sociology of aesthetics have had a significant impact.
<h3>What is perceptual schemes?</h3>
a mental image that serves as a framework for analyzing data brought in by the senses or for eliciting expectations about the appearance of a certain perceptual scenario.
<h3>What is social class position?</h3>
The terms "upper class," "middle class," and "lower class" are the most prevalent hierarchical social categories used to classify people in class societies. "Social classes" refers to a set of concepts in the social sciences and political theory that are centered on models of social stratification that occur in such societies.
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