How Can I Efficiently Delete Data Across Multiple MySQL Tables with a Single Query?

Deleting Data from Multiple MySQL Tables with a Single Query

Often, data about a single entity is stored across multiple tables in a MySQL database. To delete data associated with a specific entity from all related tables, the following query approach can be used.

While using multiple DELETE statements (as mentioned in the question) can achieve the goal, a single query can be used to perform this operation more efficiently:

DELETE FROM table1, table2, table3, table4
WHERE table1.user_id = '$user_id'
AND table2.user_id = '$user_id'
AND table3.user_id = '$user_id'
AND table4.user_id = '$user_id';

This query deletes rows from multiple tables (table1, table2, table3, table4) simultaneously based on a specific condition (user_id). Note that the WHERE clause filters rows by joining the tables on the user_id column.

This approach ensures that data related to a specific user is consistently removed from all relevant tables, reducing the risk of inconsistencies and simplifying the deletion process.

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