Disable, enable, drop and recreate SQL Server Foreign Keys
※ Download: Disable foreign key constraint sql server
If the key field is nullable, then you can also set the value to null before attempting to delete it: cursor. They drop and recreate all foreign keys in a database, after deleting orphaned records, and this is all HARDCODED.
After that, we insert this data record into it: insert into t2 values 1, 2 And you will see that it will go through. Data integrity is not that important for this scenario. That will accomplish a similar thing and you wouldn't have to turn key checking on and off.
Disable, enable, drop and recreate SQL Server Foreign Keys - SET NOCOUNT ON DECLARE table TABLE RowId INT PRIMARY KEY IDENTITY 1, 1 , ForeignKeyConstraintName NVARCHAR 200 , ForeignKeyConstraintTableSchema NVARCHAR 200 , ForeignKeyConstraintTableName NVARCHAR 200 , ForeignKeyConstraintColumnName NVARCHAR 200 , PrimaryKeyConstraintName NVARCHAR 200 , PrimaryKeyConstraintTableSchema NVARCHAR 200 , PrimaryKeyConstraintTableName NVARCHAR 200 , PrimaryKeyConstraintColumnName NVARCHAR 200 , UpdateRule NVARCHAR 100 , DeleteRule NVARCHAR 100 INSERT INTO table ForeignKeyConstraintName, ForeignKeyConstraintTableSchema, ForeignKeyConstraintTableName, ForeignKeyConstraintColumnName SELECT U. I have to wonder why...
It can be needed for inserting and modifying of big amounts of data. To be honest, I already know the answer, while typing the question. But it was extremely hard for me to find it, so I think, this answer will be helpful here for someone else. But if you know better way to do it, you are free to answer. TABLES t ORDER BY t. WITH CHECK CHECK CONSTRAINT ALL note the additional WITH CHECK option otherwise existing data in the table will not be verified when turning on the constraints. This is extremely dangerous when you turned them off for bulk loading, the loaded data will not be verified without the WITH CHECK option! It is appropriate if you are doing a one-time migration large amounts of data and you are sure your import process has taken care of all the possible data integrity problems you might create. It is not appropriate from an application or on a regular basis or because the dev finds the FKs annoying they are there for a reason. To the OP, it is critical if you do this that you make sure the import itself handles all things the triggers or FK would have made sure were done. Disabling triggers in a single statement DISABLE TRIGGER and ENABLE TRIGGER - check MSDN for their syntax.
Friday, March 22, 2013 - 2:04:07 PM - Greg Robidoux David - do any of these rows look like FKs for the table in question. I am running SQL 2008 R2 as well. It can be needed for inserting and modifying of big amounts of data. Put the truncation script in a third Execute SQL task, then perform whatever other ETL processes you need to do prior to attaching the CREATE and CHECK scripts in a final Execute SQL task or two if desired at the end of your control flow. SET NOCOUNT ON DECLARE table TABLE RowId INT PRIMARY KEY IDENTITY 1, 1ForeignKeyConstraintName NVARCHAR 200ForeignKeyConstraintTableSchema NVARCHAR 200ForeignKeyConstraintTableName NVARCHAR 200ForeignKeyConstraintColumnName NVARCHAR 200PrimaryKeyConstraintName NVARCHAR 200PrimaryKeyConstraintTableSchema NVARCHAR 200PrimaryKeyConstraintTableName NVARCHAR 200PrimaryKeyConstraintColumnName NVARCHAR 200UpdateRule NVARCHAR 100DeleteRule NVARCHAR 100 INSERT INTO table ForeignKeyConstraintName, ForeignKeyConstraintTableSchema, ForeignKeyConstraintTableName, ForeignKeyConstraintColumnName SELECT U. This might be scenario where you need to load one time data and you are ok if data violate referential integrity.
