php - MySql 使用 Max on Date 进行老化报告并排除特定条件

Question

我需要为 future 几个月完成的项目准备一份预测老化报告。数据位于各个表中 - 所有表都有一个共同的 post_id 字段。让我们先看看我的表结构(我只会提及相关列)。

• 表1:01c_posts(ID，post_title，……)
• 表2:01c_project(id，post_id，end_date，......)
• 表3:01c_enquairy_products(id，post_id，confirmed_amount，......)
• 表4:01c_update(id，post_id，status_id，status_date，......)
• 表5:01c_status(status_id，状态，......)

01c_update 每个 `post_id 都有多个状态。

现在，我准备了以下 SQL，它没有错误，但根据 更新表 中的状态编号为每个项目提供多行 - 所以 sum table3 中的 confirmed_amount 将是相关项目状态数量的倍数。

    SET SQL_BIG_SELECTS=1;
    select a.post_id, b.post_title, 
    sum(if(month(a.end_date) = 1 and year(a.end_date) = 2018,c.confirmed_price, 0)) as "Jan", 
    sum(if(month(a.end_date) = 2 and year(a.end_date) = 2018,c.confirmed_price, 0)) as "Feb", 
    sum(if(month(a.end_date) = 3 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Mar", 
    sum(if(month(a.end_date) = 4 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Apr", 
    sum(if(month(a.end_date) = 5 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "May", 
    sum(if(month(a.end_date) = 6 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Jun", 
    sum(if(month(a.end_date) = 7 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Jul", 
    sum(if(month(a.end_date) = 8 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Aug",

    max(d.update_date), d.status_id
    from 01c_projects a 
    inner join 01c_posts b on a.post_id = b.ID 
    inner join 01c_enquairy_product c on a.post_id = c.post_id 
    inner join 01c_updates d on a.post_id = d.post_id 
    where a.post_id not in (select post_id from 01c_updates where status_id = 25 or status_id = 24)
    group by b.post_title
    having max(d.update_date)
    order by a.end_date

有人可以引导我去哪里吗？

Answer 1

好的，已经解决了。下面给出了最终解决方案，以便其他人在需要时可以获得帮助

    select a.post_id, b.post_title, 
sum(if(month(a.end_date) = 1 and year(a.end_date) = 2018,c.confirmed_price, 0)) as "Jan", 
sum(if(month(a.end_date) = 2 and year(a.end_date) = 2018,c.confirmed_price, 0)) as "Feb", 
sum(if(month(a.end_date) = 3 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Mar", 
sum(if(month(a.end_date) = 4 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Apr", 
sum(if(month(a.end_date) = 5 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "May", 
sum(if(month(a.end_date) = 6 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Jun", 
sum(if(month(a.end_date) = 7 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Jul", 
sum(if(month(a.end_date) = 8 and year(a.end_date) = 2018, c.confirmed_price, 0)) as "Aug",

d.update_date, d.status_id
from 01c_projects a 
inner join 01c_posts b on a.post_id = b.ID 
inner join 01c_enquairy_product c on a.post_id = c.post_id 
inner join 01c_updates d on a.post_id = d.post_id 
where a.post_id not in (select post_id from 01c_updates where status_id = 25 or status_id = 24)
AND d.id in 
(select id from 01c_updates filter join (select post_id, max(update_date) as update_date from 01c_updates
    group by post_id ) sfilter on 
    filter.post_id = sfilter.post_id
    and filter.update_date = sfilter.update_date)
group by b.post_title
order by a.end_date