MySQL触发器：新创建行的id

Question

当向临时表添加新行时，我需要在 MySQL 数据库的两个表中插入两行。 （这里的表名是开玩笑的。）

BEGIN
    DECLARE atlas_id INT ;
    DECLARE atlas_city VARCHAR(20) ;
    DECLARE image_url VARCHAR(150) ;

    SET image_url := NEW.img_url ;

select member_id, city into  atlas_id, atlas_city from girl_members order by rand() limit 1 ;

INSERT INTO `ms_community_post_cpy`(`user_id`, `content`, `cover`, `type`, `is_open`, `top`, `order`, `status`, `add_time`, `title`, `good`, `is_check`, `tag_id`, `is_vip`, `is_recommend`, `click`, `city`, `search_num`)
VALUES (atlas_id, NEW.title, null, 1, 1, 0, 0, 1, UNIX_TIMESTAMP(), '', floor(0+ RAND() * 10000), 1, 60, 0, 0, floor(0+ RAND() * 10000), atlas_city, 0) ;

INSERT INTO `ms_community_post_resources_cpy`(`post_id`, `resources_url`, `type`, `add_time`)
VALUES (NEW.id, image_url, 1, 0);

END

这里我需要将第一个插入表的ID即

ms_community_post_cpy

插入到另一个表（

post_id

）的字段（

ms_community_post_resources_cpy

）中，但我不知道如何获取主键的值第一个表中新插入的行。正确的获取方式是什么？

Answer 1

样品：

CREATE TABLE t1 (id1 INT AUTO_INCREMENT PRIMARY KEY) AUTO_INCREMENT = 10;
CREATE TABLE t2 (id2 INT AUTO_INCREMENT PRIMARY KEY, id1 INT) AUTO_INCREMENT = 20;
CREATE TABLE t3 (id3 INT AUTO_INCREMENT PRIMARY KEY) AUTO_INCREMENT = 30;

CREATE TRIGGER tr 
AFTER INSERT ON t3
FOR EACH ROW
BEGIN
  INSERT INTO t1 VALUES (DEFAULT);
  INSERT INTO t2 VALUES (DEFAULT, LAST_INSERT_ID());
END

INSERT INTO t3 VALUES (DEFAULT), (DEFAULT);

SELECT * FROM t3;
SELECT * FROM t1;
SELECT * FROM t2;

id3
30
31

id1
10
11

id2	id1
20	10
21	11

小提琴