Question

我无法运行以下查询。

我需要在每周的每一天找到每个模型使用的许多[ID]。我在运行类似查询以总结其他指标时没有遇到任何问题。

但在这种情况下，我收到一条消息“将varchar值'07：2767：90：56'转换为数据类型int时转换失败”。

我可以在没有（if if）功能的情况下执行[ID]的计数查询，没有任何问题。

SELECT model,

 count(CASE WHEN datepart(weekday, [date]) =2 THEN (ID)else 0 END) AS [Monday]
 count(CASE WHEN datepart(weekday, [date]) =3 THEN (ID)else 0 END) AS [Tuesday]
 count(CASE WHEN datepart(weekday, [date]) =4 THEN (ID)else 0 END) AS [Wednesday]
 count(CASE WHEN datepart(weekday, [date]) =5 THEN (ID)else 0 END) AS [Thursday]
 count(CASE WHEN datepart(weekday, [date]) =6 THEN (ID)else 0 END) AS [Friday]

from clientdata 

where [date] between cast ((GETDATE() -7) AS date) and cast (GETDATE()-1 AS date)
group by d.model;

Answer 1

试试这个

SELECT model,

 count(CASE WHEN datepart(weekday,[date])=2 THEN ID else 0 END) AS [Monday],
 count(CASE WHEN datepart(weekday,[date])=3 THEN ID else 0 END) AS [Tuesday],
 count(CASE WHEN datepart(weekday,[date])=4 THEN ID else 0 END) AS [Wednesday],
 count(CASE WHEN datepart(weekday,[date])=5 THEN ID else 0 END) AS [Thursday],
 count(CASE WHEN datepart(weekday,[date])=6 THEN ID else 0 END) AS [Friday]

from clientdata  d

where [date] between (GETDATE() -7) and (GETDATE()-1)
group by d.model;

Answer 2

我不确定你为什么会遇到这个特定错误，但我看到了几个问题：

在您选择的字段之后没有逗号（在星期一，星期二等之后需要一个字段）
您正在按d.model进行分组，其中d不是有效的表别名
您的查询不会返回您要查找的结果。这几天所有的计数都是一样的。您希望使用SUM，类似于：

SUM（例如，当datepart（工作日，[日期]）= 2那么其他0结束）AS [星期一]

'如果函数，则将varchar值转换为int时转换失败

2 个答案: