Where 子句中的日期部分计算

Question

我在查询的 Where 子句中的日期部分计算时遇到问题。查询返回的结果没有计算，但如果我添加条件，则什么都没有。

DECLARE @StatusId INT;
SELECT @StatusId = Id FROM company.Status WHERE Name = 'Signed' AND CompanyId = 1;
SELECT FORMAT(CAST(cont.CreatedDate AS DATE), 'MM/dd') AS newDate, 
SUM(CASE WHEN cont.UpdatedDate IS NOT NULL THEN 1 ELSE 0 END) AS TotalSignedLeads
FROM client.testw cont
WHERE cont.CompanyId = 1  
AND cont.AffiliateId = 1
AND cont.CreatedDate BETWEEN '7-01-2017' AND '7-09-2017' 
AND DATEPART(dw, cont.CreatedDate) NOT IN (1, 7) //This causes problem.
AND cont.StatusId = @StatusId 
GROUP BY CAST(cont.CreatedDate AS DATE)
ORDER BY newDate ;
This is the data above query gives without the datepart condition.  
newDate  TotalSignedLeads
07/08    7

Answer 1

好吧，既然您将cont.CreatedDate作为查询顶部的日期，我怀疑这实际上是一个varchar......因此您需要

...
and datepart(weekday, cast(cont.CreatedDate as date)) not in (1,7)
...

坏习惯踢球使用速记与日期时间操作

如果您没有收到错误，则没有任何行满足该条件。也许您的DATEFIRST设置不是您认为的那样。

另外，不确定GROUP BY CAST(@StatusId.CreatedDate AS DATE)是什么意思...

Answer 2

我怀疑你想要一个更像这样的查询：

SELECT FORMAT(CAST(cont.CreatedDate AS DATE), 'MM/dd') AS newDate, 
COUNT(cont.UpdatedDate) AS TotalSignedLeads
FROM client.testw cont
WHERE cont.CompanyId = 1 AND
cont.AffiliateId = 1 AND
cont.CreatedDate BETWEEN '2017-07-01' AND '2017-09-01' AND
DATEPART(dw, CAST(cont.CreatedDate AS DATE)) NOT IN (1, 7) AND //This causes problem.
cont.StatusId = @StatusId 
GROUP BY FORMAT(CAST(cont.CreatedDate AS DATE), 'MM/dd')
ORDER BY newDate ;

变化：

• 用于比较的日期采用标准格式，因此应正确解释。
• GROUP BY使用与列的SELECT相同的结构。
• SUM(CASE)被更简单的COUNT()所取代。
• CreatedDate的值被转换为DATE。 老实说，我不确定这能解决任何问题，因为无论如何都应该发生这种情况。