Define Primary Key, Foreign Key, and Metadata

question 74

Essay

Define Primary Key, foreign key, and metadata.

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Definitions:

Egocentrism

A cognitive bias where an individual has difficulty understanding viewpoints different from their own.

Sensorimotor Stage

The earliest stage in Piaget's theory of cognitive development, lasting from birth to about age 2, where infants learn about the world primarily through sensory experiences and manipulating objects.

Formal Operational

The final stage in Piaget's theory of cognitive development, characterized by the ability to think abstractly, logically, and to carry out systematic planning.

Concept of Conservation

A cognitive ability in child development whereby the child learns that quantity or amount does not change despite a change in the form or arrangement of objects.