Database Entity - a single person, place, or thing about which data can be stored., Primary Key - The column or columns that contain values that uniquely identify each row in a table., foreign key - A column or combination of columns that is used to establish and enforce a link between the data in two tables, Attribute - A piece of data that describes an entity, Input Mask - A string of characters that indicates the format of valid input values., Validation Rule - One way to restrict input in a table field or a control,

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