存储过程，游标，循环，数据库邮件完整实例

USE [WTCS]
GO
/****** Object:  StoredProcedure [dbo].[sp_Week]    Script Date: 01/28/2010 14:13:34 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:  deepwishly
-- Create date: 2010.1.15
-- Description: 周数据统计
-- =============================================

ALTER procedure  [dbo].[sp_Week]
as

begin
 --声明变量部分
 declare @todayDate datetime
 declare @lastWeekStartDate datetime
 declare @temp varchar(50) --用于存放游标值的中间变量
 declare @num int --记录上周是否有数据，大于零，说明抄表器已经将周数据，发送过来，就不需要计算了
 declare @count int --记录临时表中是否有数据
 --赋值部分
 set @todayDate = (select Convert(varchar(100),GETDATE(),23))
 set @lastWeekStartDate = (select DATEADD(day,-7,@todayDate))
 
 
 --如果存在，删除临时表
 if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'tempdb..#tempActualDate') and type='U')
 begin
  drop table #tempActualDate
 end
 if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'tempdb..#tempCircleTable') and type='U')
 begin
  drop table #tempCircleTable
 end
 --创建二个临时表,
 select distinct Number  into #tempCircleTable from equipment_ActualData  -- 用于游标循环
 select * into #tempActualDate from equipment_ActualData --用于操作提供操作的临时表
 
 begin   tran
   declare tempCircleTable_Cursor cursor for select  Number from #tempCircleTable
   open tempCircleTable_Cursor
   while(@@FETCH_STATUS=0) --返回被fetch语句执行的最后游标的状态
    begin
     fetch next from tempCircleTable_Cursor into @temp
     --如果存在临时表，将其删除
    if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'tempdb..#temp_WeekTable') and type='U')
     begin
      drop table #temp_WeekTable
     end
        if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'tempdb..#temp_temp') and type='U')
     begin
      drop table #temp_temp
     end
     --创建一个临时表用于存储游标等于@temp的一周数据
     select * into #temp_WeekTable from #tempActualDate where Number =@temp and
      datediff(d,ReceiveDate,@lastWeekStartDate)<=0 order by receiveDate asc
     select * into #temp_temp from #temp_WeekTable order by receiveDate desc
    --记录临时表中是否有数据
     set @count = (select count(*) from #temp_WeekTable)   

      
     --声明用于存放一周数据起始与结束二条数据变量
      --存放起始日期的
      declare @ReceiveDate datetime
      declare @Equipment_type nvarchar(100)
      declare @Number int
      declare @EngineHour_S float
      declare @HoistHour_S float
      declare @TrolleryHour_S float
      declare @GantryHour_S float
      declare @HTHour_S float
      declare @Twistlock_S float
      declare @Bak1_H_S float
      declare @Bak2_H_S float
      declare @Bak3_H_S float
      declare @Bak1_D_S float
      --声明一周结束日期的
      declare @EngineHour_E float
      declare @HoistHour_E float
      declare @GantryHour_E float
      declare @HTHour_E float
      declare @TrolleryHour_E float
      declare @Twistlock_E float
      declare @Bak1_H_E float
      declare @Bak2_H_E float
      declare @Bak3_H_E float
      declare @Bak1_D_E float
      --声明插入周数据表中的变量
      declare @EngineHour_Sub float
      declare @HoistHour_Sub float
      declare @TrolleryHour_Sub float
      declare @GantryHour_Sub float
      declare @HTHour_Sub float
      declare @Twistlock_Sub float
      declare @Bak1_H_Sub float
      declare @Bak2_H_Sub float
      declare @Bak3_H_Sub float
      declare @Bak1_D_Sub float
      
      --为各变量赋值
      set @ReceiveDate =(select top 1 ReceiveDate from #temp_WeekTable )
      set @Equipment_type =(select top 1 Equipment_type from #temp_WeekTable )
      set @Number =(select top 1 Number from #temp_WeekTable )
      set @EngineHour_S =(select top 1 EngineHour from #temp_WeekTable )
      set @HoistHour_S =(select top 1 HoistHour from #temp_WeekTable )
      set @TrolleryHour_S = (select top 1 TrolleryHour from #temp_WeekTable)
      set @GantryHour_S =(select top 1 GantryHour from #temp_WeekTable )
      set @HTHour_S =(select top 1 HTHour from #temp_WeekTable )
      set @Twistlock_S =(select top 1 Twistlock from #temp_WeekTable )
      set @Bak1_H_S =(select top 1 Bak1_H from #temp_WeekTable )
      set @Bak2_H_S =(select top 1 Bak2_H from #temp_WeekTable )
      set @Bak3_H_S =(select top 1 Bak3_H from #temp_WeekTable )
      set @Bak1_D_S =(select top 1 Bak1_D from #temp_WeekTable )
      
            
      set @EngineHour_E =(select top 1 EngineHour from #temp_temp )
      set @HoistHour_E=(select top 1 HoistHour from #temp_temp )
      set @TrolleryHour_E = (select top 1 TrolleryHour from #temp_temp)
      set @GantryHour_E =(select top 1 GantryHour from #temp_temp )
      set @HTHour_E =(select top 1 HTHour from #temp_temp )
      set @Twistlock_E =(select top 1 Twistlock from #temp_temp )
      set @Bak1_H_E =(select top 1 Bak1_H from #temp_temp )
      set @Bak2_H_E =(select top 1 Bak2_H from #temp_temp )
      set @Bak3_H_E =(select top 1 Bak3_H from #temp_temp )
      set @Bak1_D_E =(select top 1 Bak1_D from #temp_temp )
      
      --整理待插入周数据表数据
      set @EngineHour_Sub =(@EngineHour_E-@EngineHour_S)
      set @HoistHour_Sub =(@HoistHour_E-@HoistHour_S)
      set @TrolleryHour_Sub =(@TrolleryHour_E-@TrolleryHour_S)
      set @GantryHour_Sub =(@GantryHour_E-@GantryHour_S)
      set @HTHour_Sub =(@HoistHour_E-@HoistHour_S)
      set @Twistlock_Sub =(@Twistlock_E-@Twistlock_S)
      set @Bak1_H_Sub =(@Bak1_H_E-@Bak1_H_S)
      set @Bak2_H_Sub =(@Bak2_H_E-@Bak2_H_S)
      set @Bak3_H_Sub =(@Bak3_H_E-@Bak3_H_S)
      set @Bak1_D_Sub =(@Bak1_D_E-@Bak1_D_S)
      
      set @num =(select (select count(*) from equipment_WeekData where datediff(d,WeekDate,@ReceiveDate)>=0 and Equipment_type=@Equipment_type and Number=@Number ))
      if(@num>0 )
       begin
        continue
       end
       else if(@count>0)
        begin
      --将数据插入到周数据表
      insert into equipment_WeekData(WeekDate,Equipment_type,Number,EngineHour_WD,HoistHour_WD,TrolleryHour_WD,GantryHour_WD,
       HTHour_WD,Twistlock_WD,Bak1_H_WD,Bak2_H_WD,Bak3_H_WD,Bak1_D_WD) VALUES( @ReceiveDate,@Equipment_type,@Number,@EngineHour_Sub,@HoistHour_Sub,@TrolleryHour_Sub,
          @GantryHour_Sub,@HTHour_Sub,@Twistlock_Sub,@Bak1_H_Sub,@Bak2_H_Sub,@Bak3_H_Sub,@Bak1_D_Sub)
             set @num=0
          end
   if(@@error<>0)
     begin
      print('rollback tran')
      rollback tran
      return 0
     end
   commit tran
     
  --数据库邮件部分
   declare @info varchar(100)
   if(@count=0)
    begin
     set @info =(convert(varchar(100),getdate(),120)+'实时数据表中没有上周可用实时数据')
    end
   else
    begin
     set @info =(convert(varchar(100),getdate(),120)+'周数据存储过程执行成功')
    end 
   
   exec msdb.dbo.sp_send_dbmail
   @recipients='[email protected]',
   @subject ='数据库操作提醒',
   @body = @info,
   @profile_name ='DBEmail_Config';

  end

 close tempCircleTable_Cursor --关闭游标
 deallocate tempCircleTable_Cursor --释放游标 
end