1 CREATE TABLE [dbo].[Student](
 2     [Uid] [INT] IDENTITY(1,1) NOT NULL,
 3     [Name] [NCHAR](10) NULL,
 4     [BirthDay] [DATETIME] NULL,
 5     [Sex] [INT] NULL,
 6     [Age] [INT] NULL,
 7     [demo] [INT] NULL,
 8  CONSTRAINT [PK_Student] PRIMARY KEY CLUSTERED
 9 (
10     [Uid] ASC
11 )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
12 ) ON [PRIMARY]

 1 BEGIN
 2     DECLARE @a INT ,
 3         @error INT;
 4     DECLARE @temp VARCHAR(50);
 5     SET @a = 2;
 6     SET @error = 0;
 7
 8    --定义一个游标
 9     DECLARE order_cursor CURSOR
10    --申明游标为Uid
11     FOR
12         ( SELECT    [Uid]
13           FROM      Student
14         );
15     --打开游标--
16     OPEN order_cursor;
17     --开始循环游标变量--
18     FETCH NEXT FROM order_cursor INTO @temp;
19     WHILE @@FETCH_STATUS = 0    --返回被 FETCH语句执行的最后游标的状态--
20         BEGIN
21             UPDATE  Student
22             SET     Age = 15 + @a ,
23                     demo = @a
24             WHERE   Uid = @temp;
25             SET @a = @a + 1;
26             SET @error = @error + @@ERROR;   --记录每次运行sql后是否正确，0正确
27             FETCH NEXT FROM order_cursor INTO @temp;   --转到下一个游标，没有会死循环
28         END;
29     CLOSE order_cursor;  --关闭游标
30     DEALLOCATE order_cursor;   --释放游标
31 END;
32 GO
33 

 SELECT  * FROM    Student;

 1 declare @orderN varchar(50)--临时变量，用来保存游标值
 2 declare y_curr cursor FOR --申明游标 为orderNum
 3
 4 SELECT  FContractNo
 5 FROM    dbo.v_ContractInfo
 6 WHERE   FDate >= '2019-04-01 00:00:000'
 7         AND PayMode = 1
 8         AND Fstatus = 1
 9         AND FranchiseeNo IN ( '60005', '60007', '60011', '60036', '60070', '60097', '60146' )
10         AND (WbStatus IS NULL OR WbStatus=0 ) AND FContractNo NOT IN (SELECT OrderNO FROM CF_BookingCheck )
11 open y_curr --打开游标
12 fetch next from Y_curr into @orderN ----开始循环游标变量
13 while(@@fetch_status=0)---返回被 FETCH  语句执行的最后游标的状态，而不是任何当前被连接打开的游标的状态。
14
15 BEGIN
16 PRINT(@orderN)
17 INSERT INTO CF_BookingCheck (OrderNO,OverDays,WbStatus,FinanceType,WbChecker,WbCheckDate)VALUES (@orderN,0,3,0,'系统','2019-04-30 00:00:000')
18 fetch next from y_curr into @orderN --开始循环游标变量
19 END
20 close y_curr--关闭游标
21 deallocate y_curr --释放游标