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Can we update foreign key value?
The foreign key relation can be created either through SSMS GUI or T-SQL. Rules for update/delete operations may be specified explicitly. However if nothing is specified then the default rule is No Action. The rule may be changed to any other option at any time later by recreating the FK relation.
How do I automatically update foreign key?
No the foreign key is not updated automatically. You need to update the foreign key in the tables in which it is referenced by yourself else it would result in referential integrity exception. For updating the foreign key automatically you may use TRIGGERS.
Can you update a primary key value in SQL?
You can modify a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL. You can modify the primary key of a table by changing the column order, index name, clustered option, or fill factor.
Does the foreign keys automatically get updated as primary?
The syntax to enable it is described here (Micorosoft SQL but the syntax is standard and most DBMSs support it): and get that fileds are updated and deleted with cascaded way. No the foreign key is not updated automatically.
How to Cascade primary key to all referencing foreign keys?
If you have defined the Foreign Key constraints as ON UPDATE CASCADE then the Primary Key value that was changed should cascade down to all the Foreign Keys with that constraint. If you do not have the ON UPDATE CASCADE constraint, then you will need create scripts to complete the update.
What happens to EF Core when foreign keys change?
EF Core keeps navigations in alignment with foreign key values and vice versa. That is, if a foreign key value changes such that it now refers to a different principal/parent entity, then the navigations are updated to reflect this change. Likewise, if a navigation is changed, then the foreign key values of the entities involved are updated
When do I need to change the primary key?
If it’s a numeric value which on its own or in correlation with other items will not identify a person or disclose corporate confidential information the argument can be made to leave it as it is. Sometimes we have no option other than to change the Primary Key and its associated Foreign Key items.