The picture shown above is a graphical representation of database table entities and their relationships to each other, which are typically used in organizations of data within databases or information systems. An entity is a piece of data-an object or concept about which data is stored. A relationship is how the data is shared between entities. Each entity that is being shared contains data types that are called records. Within the records are specific characteristic describing the entities which are called attributes. Different attribute types generally consist of a name and their social security number.
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