Primary Key

A column or a set of columns that uniquely identifies each row in the table. A primary key must contain unique values. If the primary key consists of multiple columns, the combination of values in these columns must be unique.

Learn more

Open-source Not defined

Interesting facts

In the nodular writing of the Incas - kippu in the I-II millennium AD. were used including analogues of primary keys.

2

Development by Synergize.digital