Question

我认为我写的CTE错误，我是一位主要的新手，请您多多解释。仍然在几乎所有内容上都遇到无法约束的错误

错误消息：

无法将多部分标识符绑定为“ PS_Margin.Emp或供应商ID

不能将多部分标识符绑定为“ PS_Margin。按人员百分比计的项目利润

问题/目标：

尽管我不知道如何做到这一点，但可能需要在列名中添加别名以空格和特殊字符

WITH

Profit_Score_CTE ( [Emp or Vendor ID], [Project Profit by Person %] ) AS (
    SELECT PS_Margin.[Emp or Vendor ID], 
        CASE
        WHEN ps.[Project Profit by Person %] > .4 THEN 1
        WHEN ps.[Project Profit by Person %] > .2 THEN 3
        WHEN ps.[Project Profit by Person %] > .1 THEN 5
        WHEN ps.[Project Profit by Person %] > .05 THEN 8
        ELSE 13 END
        AS [Profit Score]
    FROM dbo.PS_Margin AS ps
)

 SELECT emp.[Employee Name], emp.[USID], [Profit Score]*0.3  AS [Final Score]
 FROM   dbo.PS_Emp AS emp
    left join Profit_Score_CTE 
    ON emp.USID = Profit_Score_CTE.[Emp or Vendor ID]

Answer 1

“无法绑定”通常是指您如何使用表别名对列进行ID。尝试为您的表指定别名，并将其用于列：

    WITH
--Section 1: Profit Score   
Profit_Score_CTE( [Emp or Vendor ID], [Project Profit by Person %] ) AS (
    SELECT PS_Margin.[Emp or Vendor ID], 
    CASE
        WHEN ps.[Project Profit by Person %] > .4 THEN 1
        WHEN ps.[Project Profit by Person %] > .2 THEN 3
        WHEN ps.[Project Profit by Person %] > .1 THEN 5
        WHEN ps.[Project Profit by Person %] > .05 THEN 8
        ELSE 13 END
        AS [Profit Score]
    FROM [dbo].[PS_Margin] ps
)

Answer 2

I'm guessing because you haven't provided enough information to reproduce the error. But I think the problem might be that you define the columns of your CTE here:

Profit_Score_CTE( [Emp or Vendor ID], [Project Profit by Person %] ) AS (

And yet you alias your second column with a different name here:

AS [Profit Score]

You need to decide which column name you want your CTE to expose and use it consistently.

Answer 3

我假设您的CTE定义正确。您的CTE名为“ Profit_Score_CTE”。您的实际选择语句引用了对象dbo.PS_Emp和dbo.PS。我猜您应该用CTE名称替换dbo.PS。例如，

with Profit_Score_CTE as (select ...) 
select emp.[Employee Name], ...
from dbo.PS_Emp as emp
left join Profit_Score_CTE
   on emp.USID = Profit_Score_CTE.[Emp or Vendor ID]
order by ...
;

别名PS仅在CTE的定义内可见。不能在使用CTE的实际select语句中使用它。注意，我为您的表提供了别名并使用了它-您应该努力实现一致的编码样式。另请注意order by子句。结果集中的行没有一个就没有定义的顺序-通常很重要。并且请使用空格使代码可读并避免容易的错误。您在计算列[最终得分]的公式中填入了所有内容。

Answer 4

感谢您的帮助！

我的新手功能区确实与此一起显示。该问题与SQL完全无关。我没有指向sql server中正确的数据库。

在SQL Server左上角屏幕上的“可用数据库”下拉框中，您需要选择要使用的数据库。这将使脚本能够找到您的数据库，并开始解决很多错误。

SQL Server CTE语句中的错误

4 个答案: