错误：在sql服务器中预期条件的上下文中指定的非布尔类型的表达式

Question

我想计算特定支持选项的行总数，其中行来自两个表，如CSPLineItem和SupportOption 。我使用下面的查询

SELECT DISTINCT sot.SupportOptionType_ID, 
    (Classic.NumberOfLines + MEN.NumberOfLines) TotalNumberOfLines 
FROM SupportOptionType sot WITH (NOLOCK) 
LEFT JOIN (
    SELECT sot.SupportOptionType_ID, 
     COUNT(li.CSPLineItem_ID) NumberOfLines 
    FROM CSPLineItem li WITH (NOLOCK) 
    INNER JOIN SupportOptionType sot WITH (NOLOCK) 
     ON sot.SupportOptionType_ID = li.SupportOptionType_ID 
    GROUP BY sot.SupportOptionType_ID 
    ) Classic 
LEFT JOIN (
    SELECT sot.SupportOptionType_ID, 
     COUNT(so.SupportOption_ID) NumberOfLines 
    FROM SupportOption so WITH (NOLOCK) 
    INNER JOIN SupportOptionType sot WITH (NOLOCK) 
     ON sot.SupportOptionType_ID = so.SupportOptionType_ID 
    GROUP BY sot.SupportOptionType_ID 
    ) MEN 

但我发现了以下错误接近最后一行：

在一个条件有望

任何人指定的上下文非布尔类型的表达式，请帮忙。

Answer 1

您需要的ON子句中添加：

SELECT DISTINCT sot.SupportOptionType_ID, (Classic.NumberOfLines + MEN.NumberOfLines) TotalNumberOfLines 
FROM SupportOptionType sot WITH (NOLOCK) 
LEFT JOIN 
(SELECT sot.SupportOptionType_ID,COUNT(li.CSPLineItem_ID) NumberOfLines 
FROM CSPLineItem li WITH (NOLOCK) 
INNER JOIN SupportOptionType sot WITH (NOLOCK) ON sot.SupportOptionType_ID = li.SupportOptionType_ID 
GROUP BY sot.SupportOptionType_ID 
) Classic 
ON sot.SupportOptionType_ID=Classic.SupportOptionType_ID 
LEFT JOIN 
(SELECT sot.SupportOptionType_ID,COUNT(so.SupportOption_ID) NumberOfLines 
FROM SupportOption so WITH (NOLOCK) 
INNER JOIN SupportOptionType sot WITH (NOLOCK) ON sot.SupportOptionType_ID = so.SupportOptionType_ID 
GROUP BY sot.SupportOptionType_ID 
)MEN 
ON sot.SupportOptionType_ID=MEN.SupportOptionType_ID 

Answer 2

SELECT distinct sot.SupportOptionType_ID, (Classic.NumberOfLines + MEN.NumberOfLines) TotalNumberOfLines 
FROM SupportOptionType sot WITH (NOLOCK) 
LEFT JOIN 
(SELECT sot.SupportOptionType_ID,COUNT(li.CSPLineItem_ID) NumberOfLines 
FROM CSPLineItem li WITH (NOLOCK) 
INNER JOIN SupportOptionType sot WITH (NOLOCK) ON sot.SupportOptionType_ID = li.SupportOptionType_ID 
GROUP BY sot.SupportOptionType_ID 
) Classic 
on sot.SupportOptionType_ID=Classic.SupportOptionType_ID 
LEFT JOIN 
(SELECT sot.SupportOptionType_ID,COUNT(so.SupportOption_ID) NumberOfLines 
FROM SupportOption so WITH (NOLOCK) 
INNER JOIN SupportOptionType sot WITH (NOLOCK) ON sot.SupportOptionType_ID = so.SupportOptionType_ID 
GROUP BY sot.SupportOptionType_ID 
)MEN 
on sot.SupportOptionType_ID=MEN.SupportOptionType_ID