Mysql - 用一个查询从多个表中删除

I have 4 tables that stores different information about a user in each. Each table has a field with user_id to identify which row belongs to which user. If I want to delete the user is this the best way to delete that users information from multiple tables? My objective is to do it in one query.

查询:

"DELETE FROM table1 WHERE user_id='$user_id';
DELETE FROM table2 WHERE user_id='$user_id';
DELETE FROM table3 WHERE user_id='$user_id';
DELETE FROM table4 WHERE user_id='$user_id';";

推荐答案

您可以使用 ON DELETE CASCADE 选项在表上定义外键约束.