CREATE TABLE IF NOT EXISTS `sys_group_user` ( `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `group_id` char(36) NOT NULL COMMENT '组ID', `user_id` char(36) NOT NULL, PRIMARY KEY (`id`), KEY `user_id_idx` (`user_id`) USING BTREE, KEY `group_id_idx` (`group_id`) USING BTREE ) ENGINE=InnoDB DEFAULT CHARSET=utf8; SELECT user_id FROM sys_group_user WHERE group_id = #{groupId} group_id IN ( #{groupIds[${index}]} ) SELECT user_id FROM sys_group_user WHERE 1 = 1 GROUP BY user_id