不久前做了一个项目，其中需要对操作数据表中的每一列数据，业务需求是，一张日报表，一张基础数据表，日报表每天都会提交数据去更新基础数据表，现在需求是拿出最近一次导入的日报数据去和基础表数据做比较，2张表的数据，对应的列，哪一列不一样，就做出标记或者其他的什么需求的，

先贴上我弄好的存储过程吧：

ALTER PROCEDURE [dbo].[sp_WechatGroup_DayReport_Import_CompareDayAndBasedata]

@Date nvarchar (20)

 AS
    BEGIN
    IF EXISTS(SELECT * FROM sysobjects WHERE name=‘#@table‘)
    DROP TABLE #@table
    ELSE

   Select *,‘‘ AS remark into #@table From WechatGroup_DayReport w where CONVERT(NVARCHAR(10),CreateDate,121) = CONVERT(NVARCHAR(10),CONVERT(DATETIME,@Date),121)

   ALTER TABLE #@table ALTER COLUMN remark NVARCHAR(800)
   UPDATE #@table  SET remark += CASE WHEN B.AnchorCity <> C.AnchorCity THEN ‘AnchorCity, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId
   
   UPDATE #@table  SET remark += CASE WHEN B.Attribute <> C.Attribute THEN ‘群属性 ,‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.city <> C.city THEN ‘城市, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.ClusterCity <> C.ClusterCity THEN ‘ClusterCity, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.CreateUser <> C.CreateUser THEN ‘创建时间, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.Department <> C.Department THEN ‘部门, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.GroupId <> C.GroupId THEN ‘群ID, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.GroupName <> C.GroupName THEN ‘群名, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.HospitalCode <> C.HospitalCode THEN ‘医院代码, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.HospitalName <> C.HospitalName THEN ‘医院名称, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.Province <> C.Province THEN ‘省, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.Region <> C.Region THEN ‘大区, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId

      UPDATE #@table  SET remark += CASE WHEN B.Status <> C.Status THEN ‘进群状态, ‘ ELSE ‘‘ END
   FROM #@table B, [dbo].[WechatGroup_BaseData] C
   WHERE B.GroupId = C.GroupId


    Select  *,ROW_NUMBER() OVER (order by GroupId) AS Raws from #@table
    
    
  END

SQL中对数据每一列的数据处理