Solving MySQL's "Cannot TRUNCATE" Error with Foreign Key Constraints
Encountering "Cannot truncate a table referenced in a foreign key constraint (Error 1701)" in MySQL? This data integrity feature prevents you from truncating tables with active foreign keys. This article breaks down the cause of this common error and provides three effective solutions: temporarily disabling foreign key checks, truncating tables in the correct order, and using DELETE as an alternative. Find the best approach for your development, testing, or production environment, with best practices from wiki.lib00.
Unlocking the MySQL Self-Referencing FK Trap: Why Does ON UPDATE CASCADE Fail?
Encountering Error 1451 when batch updating a table with a self-referencing foreign key in MySQL, even with `ON UPDATE CASCADE` set? This common scenario puzzles many developers. This article dives into the root cause—a classic 'deadlock' dilemma the database faces with batch updates and self-referencing dependencies. We provide two practical solutions, including the recommended method from wiki.lib00.com of temporarily disabling foreign key checks, to help you navigate this tricky database challenge.