Sql 将bigint转换为日期

我有两个日期，我计算如下：

CASE WHEN FinalApprovalDt is not null and mf.IncomingTocontrol = 1 THEN  DATEDIFF ( SECOND , ManualDecisionDt , lastChangesByAgentDt) END AS M_ttp
CASE WHEN FinalApprovalDt is not null and mf.IncomingTocontrol = 0 and ContractPayoutAmt > 0 THEN  DATEDIFF ( SECOND , SystemDecisionDt , lastChangesByAgentDt) END AS A_ttp

我需要在秒内得到这两个的总量，然后计算平均值，但当：

            (Case When FinalApprovalDt is not null and mf.IncomingTocontrol = 1 and ContractPayoutAmt > 0 then  DATEDIFF ( SECOND , ManualDecisionDt , lastChangesByAgentDt) End +
            Case When FinalApprovalDt is not null and mf.IncomingTocontrol = 0 and ContractPayoutAmt > 0 then  DATEDIFF ( SECOND , SystemDecisionDt , lastChangesByAgentDt) End ) As Total_TTP,

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有什么问题吗？

在该查询中有两个相互矛盾的情况，当条件不满足时，您不处理这些情况。基于

mf.IncomingTocontrol

第一种或第二种情况都将为NULL，NULL+任何内容都始终为NULL

您应该在每种情况下放置ELSE块：

(
 Case When FinalApprovalDt is not null and mf.IncomingTocontrol = 1 and ContractPayoutAmt > 0 
 then  DATEDIFF ( SECOND , ManualDecisionDt , lastChangesByAgentDt) 
 ELSE 0 End 
 +
 Case When FinalApprovalDt is not null and mf.IncomingTocontrol = 0 and ContractPayoutAmt > 0 
 then  DATEDIFF ( SECOND , SystemDecisionDt , lastChangesByAgentDt) 
 ELSE 0 End 
) As Total_TTP,

如果为NULL，则使用COALESCE对值进行换行

(
 COALESCE(Case When FinalApprovalDt is not null and mf.IncomingTocontrol = 1 and ContractPayoutAmt > 0 
 then  DATEDIFF ( SECOND , ManualDecisionDt , lastChangesByAgentDt) End, 0) 
 +
 COALESCE(Case When FinalApprovalDt is not null and mf.IncomingTocontrol = 0 and ContractPayoutAmt > 0 
 then  DATEDIFF ( SECOND , SystemDecisionDt , lastChangesByAgentDt) End, 0)
) As Total_TTP,

---

编辑您的问题并提供示例数据和所需结果。您可能缺少一两个

ELSE 0

<代码>x时的情况，然后。。。当

x

为非真时，END为

NULL

，向任何内容添加

NULL

为

NULL

。