SQL 游标使用的小例子,对于每行数据根据参数的不同进行Insert或Update操作.

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

 

ALTER proc [dbo].[sp_GetAllProVersions]
@nodeText varchar(50)
as
declare @Versions_Currenttable table
(
 ProjectId int,

 devVersion varchar(100),
 devStart datetime,
 devEnd datetime,

 qaVersion varchar(100),
 qaStart datetime,
 qaEnd datetime,

 proVersion varchar(100),
 proStart datetime,
 proEnd datetime
)

-- 声明
declare cur_titles cursor
for
--select a.*,ver.VersionNumber,convert(varchar(10),ver.StatusSince,120) as StatusSince,convert(varchar(10),ver.NextStatusBy,120) as NextStatusBy from
--(
-- select distinct D_V.ProjectID as ProjectId,max(D_V.AutoID) as D_AutoID,D_V.VersionCurrentStateID as D_VersionCS
-- from dbo.CurrentState as D_C
-- inner join Versions as D_V
-- on D_C.CurrentStateID=D_V.VersionCurrentStateID
-- group by D_V.ProjectID,D_V.VersionCurrentStateID,D_C.CurrentStateName
--) as a
--inner join  dbo.Versions as ver
--on a.D_AutoId=ver.AutoID order by a.ProjectId

select a.ProjectId,ver.AutoID as D_AutoID,a.D_VersionCS,a.VersionNumber,convert(varchar(10),ver.StatusSince,120) as StatusSince,convert(varchar(10),ver.NextStatusBy,120) as NextStatusBy from
(
 select distinct D_V.ProjectID as ProjectId,max(D_V.VersionNumber) as VersionNumber,D_V.VersionCurrentStateID as D_VersionCS
 from dbo.CurrentState as D_C
 left join Versions as D_V
 on D_C.CurrentStateID=D_V.VersionCurrentStateID
 group by D_V.ProjectID,D_V.VersionCurrentStateID,D_C.CurrentStateName
) as a
inner join dbo.Versions as ver
on a.ProjectId=ver.ProjectId  and a.versionNumber=ver.versionNumber and a.D_VersionCS=ver.VersionCurrentStateID order by a.ProjectId

 

-- 打开
open cur_titles

declare @ProjectId int
declare @D_AutoID varchar(20)
declare @D_VersionCS varchar(20)
declare @VersionNumber varchar(20)
declare @StatusSince datetime
declare @NextStatusBy datetime
declare @Version datetime
FETCH cur_titles INTO @ProjectId,@D_AutoID,@D_VersionCS,@VersionNumber,@StatusSince,@NextStatusBy
 WHILE @@FETCH_STATUS=0
  BEGIN
   if(@D_VersionCS=1)
    if exists(select * from @Versions_Currenttable where ProjectId=@ProjectId)
     begin
      update @Versions_Currenttable set devVersion=@VersionNumber,devStart=@StatusSince,devEnd=@NextStatusBy where ProjectId=@ProjectId
     End
    else
     begin
      insert into @Versions_Currenttable(ProjectId,devVersion,devStart,devEnd)
      values(@ProjectId,@VersionNumber,@StatusSince,@NextStatusBy)
     end
   if(@D_VersionCS=2)    
    if exists(select * from @Versions_Currenttable where ProjectId=@ProjectId)
     begin
      update @Versions_Currenttable set qaVersion=@VersionNumber,qaStart=@StatusSince,qaEnd=@NextStatusBy where ProjectId=@ProjectId
     End
    else
     begin
      insert into @Versions_Currenttable(ProjectId,qaVersion,qaStart,qaEnd)
      values(@ProjectId,@VersionNumber,@StatusSince,@NextStatusBy)
     end   
   if (@D_VersionCS=3)
    if exists(select * from @Versions_Currenttable where ProjectId=@ProjectId)
     begin
      update @Versions_Currenttable set proVersion=@VersionNumber,proStart=@StatusSince,proEnd=@NextStatusBy where ProjectId=@ProjectId      
     End
    else
     begin
      insert into @Versions_Currenttable(ProjectId,proVersion,proStart,proEnd)
      values(@ProjectId,@VersionNumber,@StatusSince,@NextStatusBy)
     End
 FETCH next from cur_titles INTO @ProjectId,@D_AutoID,@D_VersionCS,@VersionNumber,@StatusSince,@NextStatusBy  
  END
-- 关闭
close cur_titles

-- 释放
deallocate cur_titles

select
st.[Text] as ProjectName
,Ver.devVersion,convert(varchar(10),Ver.devStart,120) as devStart,convert(varchar(10),Ver.devEnd,120) as devEnd
,Ver.qaVersion,convert(varchar(10),Ver.qaStart,120) as qaStart,convert(varchar(10),Ver.qaEnd,120)as qaEnd
,Ver.proVersion,convert(varchar(10),Ver.proStart,120) as proStart,convert(varchar(10),Ver.proEnd,120)as proEnd
from @Versions_Currenttable as Ver
inner join s_Tree as st
on st.NodeID=Ver.ProjectId
where st.parentid in
(
select nodeid from s_tree where [Text]=@nodeText
)
--exec sp_GetAllProVersions