I have three tables as follows -
But when I add the foreign key reference, the relation is ( a straight line in the Database Diagram) not shown .
Following is the reference I wrote.
ALTER TABLE [dbo].EmployeeDesignation
ADD CONSTRAINT FK_EmployeeDesignation_Employee FOREIGN KEY (EmployeeId)
REFERENCES Employee (EmployeeId)
ON DELETE CASCADE
ON UPDATE CASCADE
;
ALTER TABLE [dbo].[EmployeeDesignation]
ADD CONSTRAINT FK_EmployeeDesignation_Designation FOREIGN KEY (DesignationId)
REFERENCES Designation (DesignationId)
ON DELETE CASCADE
ON UPDATE CASCADE
;
In addition, When I add another two tables ( Department and EmployeeDepartment
) I can see the relation in the diagram
The code for the reference is as follows --
ALTER TABLE [dbo].EmployeeDepartment
ADD CONSTRAINT FK_EmployeeDepartment_Department FOREIGN KEY (DepartmentId)
REFERENCES Department (DepartmentId)
ON DELETE CASCADE
ON UPDATE CASCADE
;
ALTER TABLE [dbo].EmployeeDepartment
ADD CONSTRAINT FK_EmployeeDepartment_Employee FOREIGN KEY (EmployeeId)
REFERENCES Employee (EmployeeId)
ON DELETE CASCADE
ON UPDATE CASCADE
;
What might be the reason That the later one showing relation line while the previous one is not showing? Am I missing something?
Thanks !
Try closing SSMS and then reopening it again. Seems like the cache used by SSMS for some of functionality is not refreshed even upon closing and re-opening the database connection. check https://stackoverflow.com/a/4316415/364084
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