Sql 如何连接具有一个公共列的三个select查询

我有三个select查询，如下所示，分别给出了相应的输出

select DATE_FORMAT(table1.value_date,'%b')as Month,
       DATE_FORMAT(table1.value_date,'%Y') as Year,
       table1.open as Open 
from index_main as table1 
    join ( select min(`value_date`) `value_date` 
           from index_main 
           group by month(`value_date`), year( `value_date`) 
    ) as table2 on table1.`value_date` = table2.`value_date`

输出列-月、年、打开

select DATE_FORMAT(table1.value_date,'%b')as Month,
    DATE_FORMAT(table1.value_date,'%Y') as Year,
    table1.close as Open 
from index_main as table1 
    join ( select max(`value_date`) `value_date` 
           from index_main group by month(`value_date`), year( `value_date`) 
    ) as table2 on(table1.`value_date` = table2.`value_date`)

输出列-月、年、结束

select DATE_FORMAT(table1.value_date,'%b')as Month,
    DATE_FORMAT(table1.value_date,'%Y') as Year,
    max(table1.high) as High 
FROM `index_main` as table1 
GROUP BY table1.month,table1.year 
ORDER BY year(table1.value_date) desc, month(table1.value_date) desc

输出列-月、年、高、低

我想根据常用列（即月份和年份）加入这三个select查询

我的最终结果应该有以下列-月、年、开、关、高、低。

试试这个

首先创建3个视图，每个查询一个（vw1、vw2和vw3）。然后使用如下查询：

SELECT vw1.Month, vw1.Year, Open, Close High FROM vw1 LEFT join vw2 on vw1.Year=vw2.Year and vw1.Month=vw2.Month LEFT JOIN vw3 on vw1.Year=vw3.Year and vw1.Month=vw3.Month

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希望这对您有所帮助。

可能重复：@Andrew-谢谢您的指导。这对我有用。