Info of Database

A foreign key is a field or collection of fields in a table that refers to the Primary key of the … Baca selengkapnya Database Foreign Key And Primary Key

It can contain duplicate values in a. This topic contains the following sections. Difference Bet… Baca selengkapnya Database Primary Key And Foreign Key

In PERSON table passport_number license_number SSN are keys since they are unique for each person.… Baca selengkapnya Database Primary Key And Foreign Key Examples

A table can have only primary key whereas there can be multiple unique key on a table. In a relati… Baca selengkapnya Database Primary Key Vs Index