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1 key
The attribute of an entity type that specifies which property or set of properties is used to identify unique instances of the entity type. -
2 class key
The subset of data members of a class whose values uniquely identify an instance of the class. -
3 alternate key
A candidate key that is not designated as the primary key and is used to uniquely identify records in a database table. -
4 natural key
A primary key or alternate key whose values identify objects in the real world. -
5 primary key
"One or more fields that uniquely identify each record in a table. In the same way that a license plate number identifies a car, the primary key uniquely identifies a record." -
6 surrogate key
A single attribute candidate key whose values are system-generated and that does not represent properties that identify objects in the real world. -
7 scan code
A code generated by the keyboard software to identify the key pressed in a unique manner. -
8 certificate of authenticity
"A label with sophisticated anti-counterfeiting features that helps the end user identify that the computer uses a validly licensed copy of Microsoft Windows. The product name and a unique product key appear in the center of the label. The OEM must physically attach the COA label to the computer chassis, and it should never be removed from the computer."English-Arabic terms dictionary > certificate of authenticity
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9 COA
"A label with sophisticated anti-counterfeiting features that helps the end user identify that the computer uses a validly licensed copy of Microsoft Windows. The product name and a unique product key appear in the center of the label. The OEM must physically attach the COA label to the computer chassis, and it should never be removed from the computer."
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