Sql Server 2008 Create Foreign Key Manually
- by tgriffiths
I have inherited an old database which wasn't designed very well. It is a Sql Server 2008 database which is missing quite a lot of Foreign Key relationships. Below shows two of the tables, and I am trying to manually create a FK relationship between dbo.app_status.status_id and dbo.app_additional_info.application_id
I am using SQL Server Management Studio when trying to create the relationship using the query below
USE myDatabase;
GO ALTER TABLE dbo.app_additional_info
ADD CONSTRAINT FK_AddInfo_AppStatus FOREIGN KEY (application_id)
REFERENCES dbo.app_status (status_id)
ON DELETE CASCADE
ON UPDATE CASCADE ;
GO
However, I receive this error when I run the query
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
"FK_AddInfo_AppStatus". The conflict occurred in database
"myDatabase", table "dbo.app_status", column 'status_id'.
I am wondering if the query is failing because each table already contains approximately 130,000 records?
Please help.
Thanks.
