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________ founded Amazon.com.
Required
A constraint in databases or forms that enforces a field to be filled in or provided with data before saving or proceeding.
Referential Integrity
A concept in databases ensuring that relationships between tables remain consistent, typically enforced through foreign keys.
Yes/No Data Type
A specific data type used in databases for fields that can only hold two possible values, typically representing true or false, or yes or no conditions.
Default Value
A pre-set value automatically assigned to a database field or a program variable if no other value is specified by the user or program.
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