如何在使用存储过程时创建具有自动增量的 id 字段？

Posted 2023-05-09

【中文标题】如何在使用存储过程时创建具有自动增量的 id 字段？

【英文标题】：How to create id field with auto increasement while using stored procedure?

【发布时间】：2020-03-15 16:03:35

【问题描述】：

我有这个存储过程。如何选择一个变量作为可以在 sp 的每一行结果中 +1 值的字段？我需要它来制作一个虚拟 id 字段。请帮帮我。

CREATE DEFINER=`root`@`localhost` PROCEDURE `customer_order$count_order_by_month`()
BEGIN
    select count(1) as amount, month(created_date) as months, year(created_date) as years
    from customer_order
    group by   fn month(created_date) , MONTH(created_date), YEAR(created_date)
    order by Year(created_date), month(created_date);
END

【参考方案1】：

你只是想要row_number()吗？

select row_number() over (order by min(created_date)) as seqnum,
       count(1) as amount, month(created_date) as months, year(created_date) as years
from customer_order
group by   fn month(created_date) , MONTH(created_date), YEAR(created_date)
order by Year(created_date), month(created_date);

【讨论】：

非常感谢。我不知道基本的 sql 查询。