sql-server - 消息 529，级别 16，状态 2，行 1 不允许从数据类型 int 到时间的显式转换

Question

SELECT 
    Reference_Number,
    c.First_Name + ' ' + c.Last_Name AS 'Customer_Name',
    Staff_FirstName + ' ' + Staff_LastName AS 'Staff_Name',   
    Date_Time, Summary, OtherDetails,
    CAST(Hold_Time AS TIME(0)) AS 'HoldTime',
    CAST(Duration AS TIME(0)) AS 'Duration',
    Call_Status         
FROM
    Support_Call AS tc 
INNER JOIN 
    customer AS c ON c.CustomerID = c.CustomerID
INNER JOIN 
    staff AS s ON tc.StaffID = s.StaffID
WHERE 
    Call_Status LIKE 'Pending%'
ORDER BY 
    Date_Time DESC;

我正在尝试计算未决呼叫的所有详细信息，但出现错误。Reference_number是INT数据类型

Answer 1

我猜 [Duration] （和/或 [Hold_Time]）是 INT 类型，如果该值以分钟为单位（否则相应更改），然后使用：

CAST(DATEADD(mi, Duration, CAST(0 AS DATETIME)) as time(0)) AS 'Duration'

由于您使用 TIME(0) 数据类型，因此转换后的字段值不能大于 24h

Answer 2

我修好了，非常感谢

SELECT Reference_Number,
       First_Name+' '+Last_Name AS 'Customer_Name',
       Staff_FirstName+' '+Staff_LastName AS 'Staff_Name',    
       Date_Time,Summary, OtherDetails,
       Call_Status      
FROM Support_Call AS tc INNER JOIN customer AS c
    ON c.CustomerID = c.CustomerID
    INNER JOIN staff AS s
        ON tc.StaffID =s.StaffID
WHERE Call_Status LIKE 'Pending%'
ORDER BY Date_Time DESC;

Answer 3

这可能有帮助吗？

Declare @Datum varchar(10)='3:00:00 PM'

--Convert it into Hour as integer 
Select  (cast (  SUBSTRING(@Datum, 1, CHARINDEX(':', @Datum, 1)-1)     as numeric (10,2))  +Cast ( (SUBSTRING(@Datum,(CHARINDEX(':', @Datum, 1)+1),2)) as numeric (10,2))/60)