How do you truncate a table referenced in a foreign key constraint?

How do you truncate a table referenced in a foreign key constraint?

Run ALTER TABLE

DROP FOREIGN KEY

Can you truncate the table whose primary key is lined as foreign key in another table?

Cannot truncate table because it is being referenced by a FOREIGN KEY constraint.

How do you change a foreign key reference in a table?

To modify a foreign key

1. In Object Explorer, expand the table with the foreign key and then expand Keys.
2. Right-click the foreign key to be modified and select Modify.
3. In the Foreign Key Relationships dialog box, you can make the following modifications. Selected Relationship.
4. On the File menu, click Savetable name.

How do I remove a foreign key from a table?

You can try it if the commands do not work.

1. Expand your database view.
2. Right Click on Table which has foreign key constraint.
3. Right click on the column which has the foreign key reference.
4. A list of relationships will appear (if you have one) in a pop up window.
5. From there you can delete the foreign key constraint.

How do you remove constraints in a table?

The SQL syntax to remove a constraint from a table is,

1. ALTER TABLE “table_name” DROP [CONSTRAINT|INDEX] “CONSTRAINT_NAME”;
2. ALTER TABLE Customer DROP INDEX Con_First;
3. ALTER TABLE Customer DROP CONSTRAINT Con_First;
4. ALTER TABLE Customer DROP CONSTRAINT Con_First;

Can we truncate a table with primary key?

To delete data from a table referenced by a foreign key constraint, you cannot use the TRUNCATE TABLE statement. In this case, you must use the DELETE statement instead. It is not the case for the DELETE statement.

Can you truncate a table with foreign key?

You can’t truncate a table that has a foreign key constraint, that is the whole reason for having a constraint. You will need to delete and re-create the constraints so make sure you script them out before deleting them.

Which statement should you use to remove a foreign key?

Once a foreign key has been created, you may find that you wish to drop the foreign key from the table. You can do this with the ALTER TABLE statement in SQL Server (Transact-SQL).

How can I delete all rows in a table without removing the table structure attributes and indexes?

DELETE FROM table_name WHERE Condition; To remove all the rows from the table: DELETE FROM table_name; This statement removes all the records from table but the table itself is not deleted, thus table structure, attributes and indexes remains intact.

Can we delete constraints in primary or foreign key?

To successfully change or delete a row in a foreign key constraint, you must first either delete the foreign key data in the foreign key table or change the foreign key data in the foreign key table, which links the foreign key to different primary key data.