mysql - 将选择转换为数组以进行 DELETE FROM

Question

我有一个相当复杂的选择，它返回一个 id 数组。我现在想使用这个 id 数组

DELETE FROM cart_items WHERE id in (

    SELECT id AS the_count 
    FROM cart_items 
    GROUP BY session_code 
    HAVING COUNT(session_code) > 100

);

我想做的是使用内部选择(有效)作为 IN 删除数组...

这段代码抛出错误:

“您无法在 FROM 子句中指定要更新的目标表‘cart_items’”

Answer 1

尝试使用子选择并提供新别名

DELETE FROM cart_items WHERE id in (
SELECT cart_items_todelete.id FROM (
    SELECT id  
    FROM cart_items 
    GROUP BY session_code 
    HAVING COUNT(session_code) > 100 
) cart_items_todelete  

);