MySql在日期上使用Max on Date排除特定條件

Question

我需要為未來幾個月完成的項目准備一份預測老化報告。 數據位於各種表中-所有表都有一個公用的post_id字段。 首先讓我們看一下我的表結構（我只會提到相關的列）。

• table1：01c_posts（ID，post_title，......）
• table2：01c_project（id，post_id，end_date，.....）
• table3：01c_enquairy_products（id，post_id，confirmed_amount，.....）
• table4：01c_update（id，post_id，status_id，status_date，.....）
• table5：01c_status（status_id，status，.....）

01c_update對每個`post_id具有多個狀態。

現在，我已經准備好下面的SQL它沒有錯誤，但給多行根據他們的狀態數字每個項目update table -這樣的sum的confirmed_amount在table3將有多個用於相關項目的狀態數目。

    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

有人可以指導我我想念的地方嗎？

Answer 1

好，解決了。 最終解決方案如下所示，因此其他人可以在需要時獲得幫助

    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