How to implement data deletion through MySQL joins?

In MySQL, you can achieve cascading delete by using foreign key constraints and ON DELETE CASCADE.

First, set a foreign key constraint between the two tables. For example, if table A has a foreign key pointing to the primary key of table B:

ALTER TABLE A
ADD CONSTRAINT fk_b_id
FOREIGN KEY (b_id) REFERENCES B(id)
ON DELETE CASCADE;

When a record is deleted from table B, the corresponding record in table A will also be automatically deleted.

Caution should be exercised when using the ON DELETE CASCADE operation, as it can lead to cascading deletes and potentially cause data inconsistency.