Sql server存储过程中常见游标循环用法

DECLARE 
@A1 VARCHAR(10),
@A2 VARCHAR(10),
@A3 INT
DECLARE YOUCURNAME CURSOR FOR SELECT A1,A2,A3 FROM YOUTABLENAME 
OPEN YOUCURNAME 
fetch next from youcurname into @a1,@a2,@a3 
while @@fetch_status<>-1
 begin 
--您要执行的操作写在这里 
fetch next from youcurname into @a1,@a2,@a3 
end 
close youcurname 
deallocate youcurname

Create PROCEDURE  [dbo].[Usp_CreatePanicBuyingCode](
 @OrderNumber VARCHAR(50))
AS  
DECLARE 
@A1 VARCHAR(10),
@A2 VARCHAR(10),
@A3 INT
  begin try  
    begin tran 
   DECLARE youcurname CURSOR  FOR SELECT A1,A2,A3 FROM YOUTABLENAME
OPEN youcurname
fetch next from youcurname into @a1,@a2,@a3
while @@fetch_status<>-1
begin
--您要执行的操作写在这里
fetch next from youcurname into @a1,@a2,@a3
end
close youcurname
deallocate youcurname
COMMIT TRAN  
end try   
begin catch   
    ROLLBACK  
end catch