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primary key

Allg. Hauptschlüssel n; Primärschlüssel m; Erst-Schlüssel m; Master-Schlüssel m
comp. primärer Schlüssel
micr. Primärschlüssel m (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)
 Englisch Thesaurus
Primary Key
Mil., Abkürz. PK