How to add 'ON DELETE CASCADE' in ALTER TABLE statement
First drop your foreign key and try your above command, put add constraint instead of modify constraint. Now this is the command: ALTER TABLE child_table_name ADD CONSTRAINT …
DELETE CASCADE and UPDATE CASCADE in SQL Server foreign key
In this article, we will review on DELETE CASCADE AND UPDATE CASCADE rules in SQL Server foreign key with different examples. DELETE CASCADE: When we create a foreign …
SQL ALTER TABLE ON DELETE CASCADE - Stack Overflow
Oct 22, 2013 · PRIMARY KEY (Book_id, Branch_id), FOREIGN KEY (Book_id) REFERENCES BOOK (Book_id), FOREIGN KEY (Branch_id) REFERENCES LIBRARY_BRANCH …
SQL Script to alter ALL Foreign Keys to add ON DELETE CASCADE
You can write your own sp to query the system table for all the foreign keys, drop them and recreate them. You'll have to use dynamic sql in your sp to do this where you can loop through …
SQL Server: Foreign Keys with cascade delete - TechOnTheNet
This SQL Server tutorial explains how to use Foreign Keys with cascade delete in SQL Server with syntax and examples. If a record in the parent table is deleted, then the corresponding …
SQL Script to alter ALL Foreign Keys to add ON DELETE CASCADE …
Jul 28, 2022 · I have a lot of Foreign Key Columns with cascade delete set to NO ACTION in some specific Schema and I want to Set the FK Columns to ON DELETE SET NULL (for …
Cascade in SQL - GeeksforGeeks
Dec 12, 2024 · Let's create the database in SQL server management studio and then create a a parent table (which contains the primary key) and child table (which contains the foreign key) …
Using DELETE CASCADE Option for Foreign Keys - SQL Server …
Aug 1, 2012 · This tip will look at the DELETE CASCADE option when creating foreign key constraints and how it helps keep the referential integrity of your database intact. Solution
Understanding ON DELETE CASCADE and ON UPDATE CASCADE in SQL Foreign ...
Mar 19, 2024 · Two critical options that can be applied to foreign key constraints are ON DELETE CASCADE and ON UPDATE CASCADE. These options automate the maintenance of …
SQL Server Foreign Key Update and Delete Rules
Apr 21, 2011 · SQL Server provides different rules for managing the effect of updates and deletes on child table values. How can these rules be used effectively without threatening the …