游标学习案例

  1 declare @GoodsID varchar(255);
  2 declare @GoodsName varchar(255);
  3 set @GoodsID =‘G050003‘ ;
  4 set @GoodsName=‘美的空调‘;
  5 select @GoodsID 商品编号,@GoodsName 商品名称
  6 
  7 
  8 select * from t_ICItem where FNumber like ‘04.01.%‘ and len(FNUmber)=9 order by FName
  9 
 10 select top 10 * from t_ICItem where FNumber like ‘04.01.%‘ and len(FNUmber)=9 order by FName
 11 
 12 declare ItemItem  CURSOR
 13 for select top 10 FNumber,FName,FModel from t_ICItem where FNumber like ‘04.01.%‘ and len(FNUmber)=9 order by FName
 14 
 15 
 16 ---练习1
 17 
 18 
 19 --定义测试表
 20 create table Test_Item(
 21 ID int,
 22 FNumber varchar(255),
 23 FName varchar(255),
 24 FModel varchar(255));
 25 GO
 26 declare @rowNums int;
 27 declare @FNumber varchar(255);
 28 declare @FName  varchar(255);
 29 declare @FModel varchar(255);
 30 declare @i int;
 31 declare Item_CURSOR  CURSOR
 32 for select top 10 FNumber,FName,FModel from t_ICItem where FNumber like ‘04.01.%‘ and len(FNUmber)=9 order by FName;
 33 open Item_CURSOR
 34     set @i=1;
 35     --while(@@FETCH_STATUS=0)
 36     while(1=1)
 37     begin
 38         FETCH NEXT FROM Item_CURSOR into @FNumber,@FName,@FModel;
 39         --print @@CURSOR_ROWS;
 40         print ‘开始‘;
 41         print @i;
 42         if(@i<=10)
 43            insert into Test_Item values(@i,@FNumber,@FName,@FModel)
 44         else
 45            break;
 46         print ‘结束‘;
 47         set @i=@i+1;
 48         select @rowNums=Count(FName) from Test_Item;
 49     end
 50 close Item_CURSOR
 51 
 52 
 53 
 54 DEALLOCATE  Item_CURSOR;
 55 
 56 drop table Test_Item;
 57 
 58 select * from Test_Item
 59 
 60 
 61 
 62 ---练习2
 63 
 64 
 65 --定义测试表
 66 create table Test_Item(
 67 ID int,
 68 FNumber varchar(255),
 69 FName varchar(255),
 70 FModel varchar(255));
 71 GO
 72 
 73 
 74 
 75 declare @FNumber varchar(255);
 76 declare @FName  varchar(255);
 77 declare @FModel varchar(255);
 78 declare @ID int;
 79 declare Item_CURSOR  CURSOR
 80 for select top 10 FNumber,FName,FModel from t_ICItem where FNumber like ‘04.01.%‘ and len(FNUmber)=9 order by FName;
 81 open Item_CURSOR
 82     set @ID=0;
 83     FETCH NEXT FROM Item_CURSOR into @FNumber,@FName,@FModel;
 84     while(@@FETCH_STATUS=0)
 85     begin
 86         set @ID=@ID+1;
 87         print ‘开始‘;
 88         insert into Test_Item values(@ID,@FNumber,@FName,@FModel)
 89         print ‘结束‘;
 90         FETCH NEXT FROM Item_CURSOR into @FNumber,@FName,@FModel;
 91               
 92     end
 93 close Item_CURSOR
 94 
 95 
 96 
 97 DEALLOCATE  Item_CURSOR;
 98 
 99 drop table Test_Item;
100 
101 
102 select top 10 * from t_ICItem where FNumber like ‘04.01.%‘ and len(FNUmber)=9 order by FName
103 
104 select * from Test_Item