转换日期和/或时间从字符串转换失败

Question

我在做什么是使用自己的函数，这是返回字符串，现在我想这个列进行排序，而使用它进行排序时，它没有正确排序，因为它一个字符串，当我试图转换为日期时间它会导致错误。

任何帮助吗？

非常感谢。

SELECT 
    b.CallId, 
    CONVERT(VARCHAR(25), b.ETADate, 103) as'ETADate', 
    dbo.getCallEntrySerialNoLastTranDateTime(b.CallEntrySerialNumbersId) AS 'closingDateTime' 
FROM 
    CallEntry AS a, CallEntrySerialNumbers AS b  
WHERE 
    a.ASPId = 2 
    AND a.CompanyId = 3 
    AND a.CallId= b.CallId 
    AND a.ProdCompanyId = 1 
    AND b.CallCaseId IS NOT NULL 
    AND b.CallCaseId NOT LIKE 'NA' 
    AND ProdCategoryid = 1 
    AND a.CallDateTime > dateadd(day, -30, getdate()) 
    AND b.StatusId = 2 
ORDER BY 
    dbo.getCallEntrySerialNoLastTranDateTime(b.CallEntrySerialNumbersId) ASC 

// what I tried and causes above error is 
ORDER BY 
    CONVERT(DATE, dbo.getCallEntrySerialNoLastTranDateTime(b.CallEntrySerialNumbersId)) asc 

编辑，添加功能

ALTER FUNCTION [dbo].[ASP_getCallEntrySerialNoLastTranDateTime] 
(
    @CallEntrySerialNumbersId bigint 

) 
RETURNS varchar(500) 
AS 
BEGIN 

    DECLARE @ReturnVal NVARCHAR(500); 
    begin 

    select @ReturnVal = (select Top 1 CONCAT(CONVERT(VARCHAR(10),CallTranEndDateTime,103),' ',CONVERT(VARCHAR(10),CallTranEndDateTime,108)) from calltransactions 
    where CallEntrySerialNumbersId = @CallEntrySerialNumbersId AND CallTranTypeId = 3 
     order by CallTranId desc) 

    end;  

    RETURN @ReturnVal; 
END 

Answer 1

尝试这一个 -

SET DATEFORMAT dmy 

SELECT * 
FROM (
    SELECT 
      b.CallId 
     , ETADate = CONVERT(VARCHAR(25), b.ETADate, 103) 
     , closingDateTime = dbo.getCallEntrySerialNoLastTranDateTime(b.CallEntrySerialNumbersId) 
    FROM dbo.CallEntry a 
    JOIN dbo.CallEntrySerialNumbers b ON a.CallId = b.CallId 
    WHERE a.ASPId = 2 
     AND a.CompanyId = 3 
     AND a.ProdCompanyId = 1 
     AND ISNULL(b.CallCaseId, '') NOT LIKE 'NA' 
     AND ProdCategoryid = 1 
     AND a.CallDateTime > DATEADD(day, -30, GETDATE()) 
     AND b.StatusId = 2 
) d 
ORDER BY CAST(d.closingDateTime AS DATE) 

ALTER FUNCTION [dbo].[ASP_getCallEntrySerialNoLastTranDateTime] 
(
    @CallEntrySerialNumbersId BIGINT 
) 
RETURNS VARCHAR(30) 
AS BEGIN 

    DECLARE @ReturnVal VARCHAR(30) 

    SELECT @ReturnVal = ( 
     SELECT TOP 1 CONVERT(VARCHAR(10), CallTranEndDateTime, 103) + ' ' + CONVERT(VARCHAR(10), CallTranEndDateTime, 108) 
     FROM dbo.CallTransactions 
     WHERE CallEntrySerialNumbersId = @CallEntrySerialNumbersId 
      AND CallTranTypeId = 3 
     ORDER BY CallTranId DESC 
    ) 

    RETURN @ReturnVal 

END