为什么我加入表时列变得不明确？

Posted 2021-04-11

我正在努力做到这一点：

with ：（获取错误“错误代码：1052。字段列表中的列'INV_NUMBER'不明确“）

SELECT CONCAT(CUS_FNAME, " " ,CUS_LNAME) AS 'Customer', 
INV_NUMBER AS 'inv_number',
DATE_FORMAT(invoice.INV_DATE, '%W') AS 'Day of Week' 
SUM(line.LINE_PRICE)

FROM customer

RIGHT JOIN INVOICE ON invoice.CUS_CODE = customer.CUS_CODE
JOIN LINE

WHERE CUS_FNAME LIKE 'Leona%' 
OR CUS_FNAME LIKE '%Paul%'
OR CUS_FNAME LIKE  '%Myron%' 

GROUP BY INV_NUMBER;

与此相对：

with：

SELECT CONCAT(CUS_FNAME, " " ,CUS_LNAME) AS 'Customer', 
INV_NUMBER AS 'inv_number',
DATE_FORMAT(invoice.INV_DATE, '%W') AS 'Day of Week' 

FROM customer

RIGHT JOIN INVOICE ON invoice.CUS_CODE = customer.CUS_CODE


WHERE CUS_FNAME LIKE 'Leona%' 
OR CUS_FNAME LIKE '%Paul%'
OR CUS_FNAME LIKE  '%Myron%' 

GROUP BY INV_NUMBER;

这里是ERD：

（（更好的解释？）第二个代码是我在处理问题时想出的一切，直到我在第一个代码中添加了一些语句之前，所有工作都进行了。我正在尝试添加“花了钱”列，但我不断收到错误消息：

错误代码：1052。字段列表中的列“ INV_NUMBER”不明确

答案

您的INV_NUMBER可能来自LINE或INVOICE。在您的选择中指定它：

SELECT
  `INVOICE`.`INV_NUMBER` AS 'inv_number'