Using PhP/MySQL, how can I delete records from two tables with a common user_id

I'm trying to delete all records (by user_id) from two tables. Below is my script. It's not generating errors but its also not deleting records.  Hopefully someone can lend some clarity!

// Get the user ID of the user to delete
$user_id = $_GET['user_id'];

// Build the DELETE statement
$delete_query = sprintf("DELETE FROM users t1 INNER JOIN user_training_items t2 ON t1.user_id=t2.user_id WHERE t1.user_id= %d",

// Delete the user from the database

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DELETE users, user_training_items FROM users INNER JOIN user_training_items
WHERE users.user_id= user_training_items.user_id and users.user_id= %d

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chaddcarrAuthor Commented:
Thanks, Gary!  Exceptional advice as always!
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