ale hups Bbhosted.cuny.edu/we Remaining Time: 37 minutes, 12 seconds. Question C

Question

ale hups Bbhosted.cuny.edu/we Remaining Time: 37 minutes, 12 seconds. Question Completion Status: QUESTION 48 What is a primary key? OA A field (or group of fields) that uniquely identifies a given record in a table. primary key of one table that appears as an attibute in another table and acts to provide a logical rela C. Characteristics or properties of an entity D. A field (or group of fields) that uniquely identifies a given attribute in a table. B. A key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two table

Explanation / Answer

A primary key is a special relational database table column (or combination of columns) designated to uniquely identify all table records.

A primary key’s main features are:

A primary key is either an existing table column or a column that is specifically generated by the database according to a defined sequence.

Therefore,

PRIMARY KEY IS A FIELD ( OR GROUP OF FIELDS ) THAT UNIQUELY IDENTIFIES A GIVEN RECORD IN A TABLE

PRIMARY KEY IS A FIELD ( OR GROUP OF FIELDS ) THAT UNIQUELY IDENTIFIES A GIVEN RECORD IN A TABLE

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