通过case when实现SQL 多个字段合并为一列值


with tt as (select A.GID, CASE  WHEN A.IsApp='' THEN 'APP' else '' end 'APP', CASE  WHEN A.IsSmallApp='' THEN '小程序' else '' end 'SmallApp' from  Order A ) select A.SalePrice,A.SaleStatus, --销售参与渠道 --(A.IsApp+','+A.IsSmallApp), --CASE WHEN A.IsApp='是' THEN 'APP' else '' end 'APP', --CASE WHEN A.IsSmallApp='是' THEN '小程序' else '' end 'SmallApp',
(TT.APP+','+TT.SmallApp) as ChannelType, --销售参与渠道
detail.SumQty--销售总数
from order (nolock) A INNER JOIN  orderdetail (nolock) B  ON A.Gid=B.orderGid LEFT JOIN (select orderGid,  sum(ISNULL (SaleQty,0)) AS SumQty from orderdetail (nolock)  group by orderGid) AS detail on a.Gid = detail.orderGid 

 


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