Delete all answers without dependencies

Question

I deleted more than 10000 questions from phpyadmin. Now I want to delete the answers of those questions. can you pls give the code to delete those questions.

for inatance:

at first that code will check whether a answer's parentid exist or not. IF not exist then it will delete. otherwise, no

Comments

How did you delete them? Referential integrity should have been enforced and, if they had dependent records, the operation should have failed

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I disabled foreign key checks.

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Why would you do that? Foreign key constraints are an important safeguard for maintaining referential integrity of your database (i.e. keeping your data consistent).