带有嵌套select的MySQL触发器

我试图创建一个MySQL触发器，它在表a上的insert之后运行，并且涉及多行。基本上，当我插入表A时，我想在表B中插入一行，其中包含表C中的每一行和表A中插入的ID。有人能帮忙吗

这是总的想法-

DELIMITER |
CREATE TRIGGER mailings_create AFTER INSERT ON mailings FOR EACH ROW
BEGIN   
    SELECT
        customer_id,
        first_name,
        last_name,
        email
    INTO
        customer_id,
        first_name,
        last_name,
        email
    FROM
        cam_customers
    WHERE
        mail_list = 'T'
        AND email IS NOT NULL;

    foreach ($data as $row) {
        INSERT INTO
            mailings_messages
            (mailings_id, first_name, last_name, customer_id, email)
        VALUES
            (NEW.id, first_name, lsat_name, customer_id, email);
    }
...

谢谢

埃文怎么样-

DELIMITER |

CREATE TRIGGER mailings_create AFTER INSERT ON mailings
    FOR EACH ROW BEGIN

        INSERT INTO mailings_messages
            (mailings_id, first_name, last_name, customer_id, email)
        SELECT NEW.id, first_name, last_name, customer_id, email
        FROM cam_customers
        WHERE mail_list = 'T'
        AND email IS NOT NULL;

        SELECT @row_count := ROW_COUNT();
        -- INSERT or UPDATE using @row_count here

    END;
|

DELIMITER ;

---

这太棒了-还有一件事-我如何在末尾添加一些东西来更新“邮件”中插入的行数的“消息”？您可以使用

SELECT ROW_COUNT（）

检索上一个查询插入的行数。我会更新我的答案。