Setting Primary & Foreign Keys in Navicat

To set primary and foreign keys in Navicat, first open the structure view of the table you want to set. Then, select the field you want to set as the primary key, right-click on it, and choose “Set as Primary Key”. Next, select the field you want to set as the foreign key, right-click on it, and choose “Set Foreign Key”.

In setting up foreign keys, you need to select the reference table and field, as well as options like cascade delete and update. Once the setup is completed, saving will apply the changes made.

Please note that setting primary keys and foreign keys should be done during the database design phase. Making changes to existing data tables may result in data loss or inconsistency. Therefore, it is important to proceed with caution and backup data when performing such operations.