SQL Server WHERE子句使用临时列

我有以下查询，它使用CASE语句。 IsBusinessDayFinal=0的where子句中是否仍有需要添加的内容？不使用临时桌子

非常感谢

SELECT 
        ac.DateTimeValue,
        CASE 
            WHEN pc.IsBusinessDay IS NOT NULL THEN pc.IsBusinessDay
            ELSE ac.IsBusinessDay
        END AS IsBusinessDayFinal,
        ac.FullYear,
        ac.MonthValue,
        ac.DayOfMonth,
        ac.DayOfWeek,
        ac.Week 
    FROM 
        [dbo].[AdminCalendar] ac LEFT JOIN
        [dbo].ProjectCalendar pc ON ac.DateTimeValue = pc.DateTimeValue AND pc.ProjectId = @projectId
    WHERE ac.DateTimeValue >= @startDate AND ac.DateTimeValue <= @finishDate;

选择
ac.DateTimeValue，
案例
当pc.IsBusinessDay不为空时，则pc.IsBusinessDay
ELSE ac.IsBusinessDay
以IsBusinessDayFinal结束，
ac.全年，
ac.MonthValue，
ac.DayOfMonth，
ac.DayOfWeek，
交流周
从…起
[dbo].[AdminCalendar]ac左加入
[dbo].ac.DateTimeValue=pc.DateTimeValue和pc.ProjectId=@ProjectId上的ProjectCalendar pc
其中ac.DateTimeValue>=@startDate和ac.DateTimeValue
其中ac.DateTimeValue>=@startDate和ac.DateTimeValue使用

您可以使用而不是大小写，因为您正在检查null：

SELECT ac.DateTimeValue,
       COALESCE(pc.IsBusinessDay, ac.IsBusinessDay) AS IsBusinessDayFinal,
       ac.FullYear,
       ac.MonthValue,
       ac.DayOfMonth,
       ac.DayOfWeek,
       ac.Week 
  FROM [dbo].[AdminCalendar] ac 
LEFT JOIN [dbo].ProjectCalendar pc ON ac.DateTimeValue = pc.DateTimeValue 
                                  AND pc.ProjectId = @projectId
WHERE ac.DateTimeValue >= @startDate 
 AND ac.DateTimeValue <= @finishDate
 AND COALESCE(pc.IsBusinessDay, ac.IsBusinessDay) = 0

选择ac.DateTimeValue，
合并（pc.IsBusinessDay，ac.IsBusinessDay）为IsBusinessDay最终版本，
ac.全年，
ac.MonthValue，
ac.DayOfMonth，
ac.DayOfWeek，
交流周
从[dbo].[AdminCalendar]ac
左连接[dbo]。ac.DateTimeValue=pc.DateTimeValue上的ProjectCalendar pc
和pc.ProjectId=@ProjectId
其中ac.DateTimeValue>=@startDate
和ac.DateTimeValue您能使用子选择吗？谢谢！我没有意识到解决方案其实很简单。我想我想得不够仔细=p+1。即使逻辑是相同的，我还是喜欢你的是空版本！
WHERE (pc.IsBusinessDay IS NULL AND ac.IsBusinessDay = 0)
OR pc.IsBusinessDay = 0

SELECT ac.DateTimeValue,
       COALESCE(pc.IsBusinessDay, ac.IsBusinessDay) AS IsBusinessDayFinal,
       ac.FullYear,
       ac.MonthValue,
       ac.DayOfMonth,
       ac.DayOfWeek,
       ac.Week 
  FROM [dbo].[AdminCalendar] ac 
LEFT JOIN [dbo].ProjectCalendar pc ON ac.DateTimeValue = pc.DateTimeValue 
                                  AND pc.ProjectId = @projectId
WHERE ac.DateTimeValue >= @startDate 
 AND ac.DateTimeValue <= @finishDate
 AND COALESCE(pc.IsBusinessDay, ac.IsBusinessDay) = 0