SQL Server:列无效

我必须从表格中提取信息并计算卖家的佣金

SELECT 
    s.st_staffno as "Staff Number", s.st_name as "Staff Name", 
    s.st_position as "Job Title", 
    COUNT(r.ren_moveindate) as "Properties Rented", 
    s.st_salary * s.st_commperc/100 as "Commission"
FROM 
    dbo.staff s
INNER JOIN 
    dbo.rental r ON (s.st_staffno = r.ren_st_staffno)
WHERE 
    s.st_commperc != NULL
GROUP BY
    s.st_staffno, s.st_name, s.st_position;

但我得到以下错误：

Msg 8120，第16级，状态1，第2行
“dbo.staff.st_salary”列在选择列表中无效，因为它未包含在聚合函数或GROUP BY子句中

Msg 8120，第16级，状态1，第2行
列“dbo.staff.st_commperc”在选择列表中无效，因为它未包含在聚合函数或GROUP BY子句中

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您有多个错误。我认为你打算：

SELECT s.st_staffno as "Staff Number", s.st_name as "Staff Name",
       s.st_position as "Job Title", 
       COUNT(r.ren_moveindate) as "Properties Rented",
       SUM(s.st_salary * s.st_commperc) / 100.0 as "Commission"
FROM dbo.staff s INNER JOIN
     dbo.rental r
     ON s.st_staffno = r.ren_st_staffno
WHERE s.st_commperc IS NOT NULL
Group BY s.st_staffno, s.st_name, s.st_position;

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在消息错误中，您在GROUP BY中没有st_salary和st_commperc，并且在聚合函数中没有，因此您应该在GROUP BY中添加

SELECT s.st_staffno as "Staff Number", s.st_name as "Staff Name", s.st_position as "Job Title", 
COUNT(r.ren_moveindate) as "Properties Rented", s.st_salary * s.st_commperc/100 as "Commission"
FROM dbo.staff s
INNER JOIN dbo.rental r
ON (s.st_staffno = r.ren_st_staffno)
WHERE s.st_commperc != NULL
Group BY s.st_staffno, s.st_name, s.st_position,s.st_salary,  s.st_commperc;

或者使用aggeìregate函数，例如：sum

SELECT s.st_staffno as "Staff Number", s.st_name as "Staff Name", s.st_position as "Job Title", 
COUNT(r.ren_moveindate) as "Properties Rented", sum( s.st_salary * s.st_commperc/100 ) as "Commission"
FROM dbo.staff s
INNER JOIN dbo.rental r
ON (s.st_staffno = r.ren_st_staffno)
WHERE s.st_commperc != NULL
Group BY s.st_staffno, s.st_name, s.st_position;

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您必须在s.st_commperc处替换=NULL，其中s.st_commperc不为NULL，并包含聚合函数SUM（），以将总佣金：SUM（s.st_salary*s.st_commperc）/100作为“佣金”

错误消息非常清楚。在

s.st_salary*s.st_commperc/100

中使用聚合函数（可能是

SUM

），或者也按这些列分组，这取决于您想要的结果Where子句应该是“Where s.st_commperc NOT NULL”@GordonBell good catch