Which precaution helps prevent unexpected large deletions when using ON DELETE CASCADE?

Problem Statement

Explanation

CASCADE can remove deep trees. Wrap deletes in a transaction, check impact with a SELECT first, and delete in small batches if needed. Keep foreign keys explicit and ensure only intended users can perform destructive actions.

Code Solution

SolutionRead Only

BEGIN;
-- preview
SELECT COUNT(*) FROM orders WHERE customer_id = :id;
-- then delete parent
DELETE FROM customers WHERE id = :id;
COMMIT;

Practice Sets

This question appears in the following practice sets:

Constraints, Keys & Data Integrity

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Which precaution helps prevent unexpected large deletions when using ON DELETE CASCADE?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

Which precaution helps prevent unexpected large deletions when using ON DELETE CASCADE?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime