Delete data with foreign key in SQL Server table

Question

I\'m going to delete data in an SQL Server table (parent) which has a relationship with another table (child).
I tried the basic Delete query. But it isn\'t working (and

Answer 1

here you are adding the foreign key for your "Child" table

ALTER TABLE child
ADD FOREIGN KEY (P_Id)
REFERENCES parent(P_Id) 
ON DELETE CASCADE
ON UPDATE CASCADE;

After that if you make a DELETE query on "Parent" table like this

DELETE FROM parent WHERE .....

since the child has a reference to parent with DELETE CASCADE, the "Child" rows also will be deleted! along with the "parent".