批量更新数据库的电子文件的版本问题

  declare @PGuid varchar(50)
  declare @Count int
  declare myCur2 Cursor LOCAL
  for( select ParentRowGuid ,Count(*) as count from [BIMPM_ModelData].[dbo].[EquipmentEFile] where ExtendName = 'rfa'
  group by ParentRowGuid HAVING count(ID) >1)

  open myCur2 
  fetch next from myCur2 into @PGuid,@Count
  while(@@FETCH_STATUS=0)
  begin
  ---select  * from [BIMPM_ModelData].[dbo].[EquipmentEFile] where ParentRowGuid = @PGuid and ExtendName = 'rfa' order by ID 

  update [BIMPM_ModelData].[dbo].[EquipmentEFile]
  set [FirstVersionRowGuid] = t2.RowGuid
  from (select top 1 ID,RowGuid from [BIMPM_ModelData].[dbo].[EquipmentEFile] where ParentRowGuid = @PGuid and ExtendName = 'rfa' order by id) t2
  where [BIMPM_ModelData].[dbo].[EquipmentEFile].ParentRowGuid = @PGuid

  update [BIMPM_ModelData].[dbo].[EquipmentEFile]
  set [IsMaxVersion] = 0
  from (select top 1 ID,RowGuid from [BIMPM_ModelData].[dbo].[EquipmentEFile] where ParentRowGuid = @PGuid and ExtendName = 'rfa' order by id desc) t2
  where [BIMPM_ModelData].[dbo].[EquipmentEFile].ParentRowGuid = @PGuid 
  and [BIMPM_ModelData].[dbo].[EquipmentEFile].[IsMaxVersion] = 1 
  AND [BIMPM_ModelData].[dbo].[EquipmentEFile].RowGuid <> t2.RowGuid

  fetch next from myCur2 into @PGuid,@Count
  end
  close myCur2