Question

我的查询如下：

WITH CTE AS (
  SELECT MIN(att.Date) [minDate]
  FROM Attendance att
  WHERE att.Date between '12/01/2011 00:00:00'
  AND '12/31/2011 00:00:00'
  AND att.EmpID = 4700
  GROUP BY EmpID, CONVERT(VARCHAR, att.Date , 111)
  HAVING MIN(CONVERT(VARCHAR, att.Date , 8)) > '09:00:00')
SELECT COUNT(minDate) FROM CTE

我需要在C＃应用程序中使用它，但我不能只使用查询，因为它说查询必须以select或from关键字开头。我需要此查询才能在HQL中使用。请帮忙。

Answer 1

您必须重写查询。

在结果中我们根本不关心日期，我们对一般结果感兴趣，因此我们可以从选择中删除日期并将其替换为EmpId *。

SELECT EmpID
  FROM Attendance att
  WHERE att.Date between '12/01/2011 00:00:00'
  AND '12/31/2011 00:00:00'
  AND att.EmpID = 4700
  GROUP BY EmpID, CONVERT(VARCHAR, att.Date , 111)
  HAVING MIN(CONVERT(VARCHAR, att.Date , 8)) > '09:00:00')

不，我们可以将问题改为这样的问题。

SELECT COUNT(EmpID) FROM Attendance WHERE EmpID IN (
  SELECT EmpID
      FROM Attendance att
      WHERE att.Date between '12/01/2011 00:00:00'
      AND '12/31/2011 00:00:00'
      AND att.EmpID = 4700
      GROUP BY EmpID, CONVERT(VARCHAR, att.Date , 111)
      HAVING MIN(CONVERT(VARCHAR, att.Date , 8)) > '09:00:00')
);

第二个查询仅重新表达CTE表达式，在大多数情况下只是语法糖。将其转换为HQL应该不是问题。

*我认为EmpID是唯一的。

Answer 2

最后它适用于这些

SELECT count(att.AttDate) 
from Attendance att 
where att.Employee.EmployeeCD = "+ empCD +" 
and att.AttDate IN 
  (SELECT MIN(att.AttDate) 
  from Attendance att 
  where att.AttDate between '" + startDate.Date + "' and '" + endDate.Date + "' 
  and att.Employee.EmployeeCD = " +  empCD + " 
  GROUP BY EmployeeCD, CONVERT(VARCHAR,att.AttDate, 111)
  having min(CONVERT(VARCHAR, att.AttDate, 8)) > '08:10:00')

如何将此SQL转换为HQL查询

2 个答案: