Introduction
Primary keys are essential for contact management since it guarantees uniqueness and correspondence during updates.
Defining primary keys
A contact is defined as a single collection of values for "primary key" fields.
One or more columns can be chosen as primary keys, the latter being mandatory.
When importing update type, the mapping of contacts between the contact list and the update file is performed using primary keys.
Conclusion
Primary keys ensure data accuracy and consistency in Contactly, facilitating contact update and management processes.