What are the common mistakes that trigger Error Code 1451 in SQL queries?

[Client Arjun Mehta]

Error Code 1451 in MySQL is triggered when you try to delete or update a parent record that is still referenced by a foreign key in a child table. Common mistakes that cause this error include:

1. Attempting to Delete Parent Records: Deleting a parent record that is linked to child records via a foreign key constraint without first handling the dependent records.
   
2. Incorrect Foreign Key Definitions: Misconfiguring foreign keys, which can prevent actions like updates or deletions from propagating properly across related tables.
   
3. Missing CASCADE Constraints: Forgetting to implement
   
   Code:

   ON DELETE CASCADE
   or
   
   Code:

   ON UPDATE CASCADE
   to automatically update or delete dependent child records when modifying the parent record.
   
4. Orphaned Child Records: Leaving orphaned child records that still reference a deleted or updated parent.
   

Fix these issues by checking foreign key constraints and handling dependent records properly.