What is Cascade?
In SQL, CASCADE is used to update or remove an entry from both the parent and child tables at the same time. The ON DELETE or ON UPDATE query uses the phrase CASCADE as a conjunction. If a user tries to delete a statement that will affect the rows in the foreign key table, then those rows will be deleted when the primary key record is deleted. Similarly, if an update statement affects rows in a foreign key table, then those rows will be updated with the value from the primary key record after it has been updated.
There are different types of cascade, each having a specific purpose in maintaining the consistency of data relationships.
Cascade in SQL
Structured Query Language (SQL) is a powerful tool for managing and manipulating relational databases. Maintaining data integrity is essential to database administration, particularly when working with table relationships. In this article, we can go through the idea of SQL CASCADE, a function that performs a considerable function in retaining referential integrity inside a database. The cascading referential integrity constraints in SQL servers are the foreign key constraints that tell SQL servers to perform certain actions whenever a user attempts to delete or update a primary key to which an existing foreign key points.
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