SUM（myfield）：算术溢出错误，将数字转换为数据类型数字

Question

SQL Server 2008 R2 SP1

SELECT 
    VEN.EAN11ZUC AS EAN
    , SUM(DET.NbMag) --<< when this line is commented, no error!!!
FROM ODS_Vente VEN
inner join ODS_DetentionCentraleArticle DET
    on VEN.EAN11ZUC = DET.EANZUC 
group by VEN.EAN11ZUC

实际输出：

  

“消息8115，将数值转换为数据类型的算术溢出错误   数字“

Answer 1

我的猜测是总和不能与源字段的数字精度/比例相同。您可以尝试将原始值转换为最大可能的精度：

SELECT 
    VEN.EAN11ZUC AS EAN
    , SUM(CAST DET.NbMag AS NUMERIC(38,{# of decimals you want to support}) ) 
FROM ODS_Vente VEN
inner join ODS_DetentionCentraleArticle DET
    on VEN.EAN11ZUC = DET.EANZUC 
group by VEN.EAN11ZUC