MySQL嵌套select语句问题

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我努力让我的嵌套SQL语句正常工作。MySQL嵌套select语句问题

它告诉我在第二个SELECT附近有一个语法错误。

任何人都可以建议吗？

SELECT date, Expense_Date, cost1 
RIGHT JOIN t ON dates.date = t.Expense_Date 
FROM (
    SELECT Expense_Date, IFNULL(Sum(Total_Cost),0) as cost1 
    FROM Expenses 
    RIGHT JOIN membership_userrecords ON Expenses.id = membership_userrecords.pkValue 
    where membership_userrecords.memberID = 'kieran' AND membership_userrecords.tableName='Expenses' 
    GROUP BY Expense_Date 

) AS t 
GROUP BY date ;

来源

2017-06-22 Kieran

试试这个

SELECT date, Expense_Date, cost1 
FROM (
    SELECT Expense_Date, IFNULL(Sum(Total_Cost),0) as cost1 
    FROM Expenses 
    RIGHT JOIN membership_userrecords ON Expenses.id = membership_userrecords.pkValue 
    where membership_userrecords.memberID = 'kieran' AND membership_userrecords.tableName='Expenses' 
    GROUP BY Expense_Date 

) AS t 
LEFT JOIN t ON dates.date = t.Expense_Date 
GROUP BY date ;

来源

2017-06-22 21:15:10

像@rahul说你失踪FROM子句 –

谢谢!!!你在这里帮了我很多。此查询的目标是显示日期表中的所有日期以及仅显示用户被允许查看的费用表中的费用。无论哪里都没有开销，我希望仍然输出日期，只显示0.但是，这并没有发生 - 我只是根据用户权限获取有限的记录集。有什么我做错了吗？ – Kieran

@Kieran处理嵌套查询时，首先验证您的内部查询为您提供了正确的数据。联接也应该是这样的： 'SELECT日期，EXPENSE_DATE，COST1 FROM（SELECT EXPENSE_DATE，IFNULL（萨姆（TOTAL_COST），0）作为COST1 FROM费用 RIGHT JOIN membership_userrecords ON Expenses.id = membership_userrecords.pkValue 其中membership_userrecords.memberID = '基兰' AND membership_userrecords.tableName = '费用' GROUP BY EXPENSE_DATE ）为T RIGHT JOIN日期ON dates.date = t.Expense_Date GROUP BY日期;' –

忘记第二SELECT ...你是在缺少FROM条款你的第一个SELECT本身所看到如下

SELECT date, Expense_Date, cost1 <-- here 
RIGHT JOIN t ON dates.date = t.Expense_Date

来源

2017-06-22 21:14:37 Rahul

MySQL嵌套select语句问题

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