怎么样更新游标？请高手指教，在线等。。。

[zyb_8022]

怎么样循环更新游标中每一条记录的值？请高手指教
下面的不对。
declare @cateid decimal
select @cateid=207
declare updatecateid cursor for select cate_id from newscategorys for update of cate_id
open updatecateid

WHILE @@FETCH_STATUS = 0
BEGIN

FETCH NEXT FROM updatecateid
update updatecateid=@cateid+1
END

CLOSE updatecateid

[zyb_8022]

declare @cateid decimal
select @cateid=207
declare updatecateid cursor for select cate_id from newscategorys for update of cate_id
open updatecateid

WHILE @@FETCH_STATUS = 0
BEGIN

FETCH NEXT FROM updatecateid
select updatecateid=@cateid
select @cateid=@cateid+1
END

CLOSE updatecateid
deallocate updatecateid
知道了怎么更新了，可是游标更新了数据库里的值并没有更新，游标不可以更新数据库里的值吗

[zjcxc]

--类似这样处理

--创建测试的表
create table newscategorys(id int identity(1,1),cate_id decimal)
insert into newscategorys
select 1
union all select 2
union all select 3
go

--定义更新处理的游标
declare updatecateid cursor for select id from newscategorys for update of cate_id
open updatecateid

declare @id int
FETCH NEXT FROM updatecateid into @id
WHILE @@FETCH_STATUS = 0
BEGIN
update newscategorys set cate_id=cate_id+1 where id=@id
FETCH NEXT FROM updatecateid into @id
END

CLOSE updatecateid
deallocate updatecateid
go

select * from newscategorys
drop table newscategorys

/*--测试结果

id cate_id
----------- --------------------
1 2
2 3
3 4

（所影响的行数为 3 行）
--*/

[zjcxc]

--楼主仔细看下面的更新游标的模板

-- =============================================
-- Declare and using an UPDATE cursor
-- =============================================
DECLARE <@variable_1, sysname, @v1> <datatype_for_variable_1, sysname, varchar(20)>,
<@variable_2, sysname, @v2> <datatype_for_variable_2, sysname, varchar(40)>

DECLARE <cursor_name, sysname, test_cursor> CURSOR
FOR SELECT <column_1, sysname, au_fname>, <column_2, sysname, au_lname> FROM <table_name, sysname, pubs.dbo.authors>
FOR UPDATE of <column_1, sysname, au_fname>

DECLARE @count smallint
SELECT @count = 1

OPEN <cursor_name, sysname, test_cursor>
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO <@variable_1, sysname, @v1>, <@variable_2, sysname, @v2>

WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
-- PRINT 'add user-defined code here...'
-- eg
PRINT 'updating record of ' + @v1 + ' ' + @v2
UPDATE pubs.dbo.authors
SET au_fname = @v1 + '-' + CAST(@count AS varchar(4))
WHERE au_lname = @v2
END
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO <@variable_1, sysname, @v1>, <@variable_2, sysname, @v2>
SELECT @count = @count + 1
END

CLOSE <cursor_name, sysname, test_cursor>
DEALLOCATE <cursor_name, sysname, test_cursor>
GO

[zyb_8022]

楼上的关于游标模板看不太明白能解释一下吗？谢谢
尖括号里的东西都代表什么意思呢？

[zjcxc]

<>里面是楼主需要根据你的情况调整的内容

[zyb_8022]

能不能具体解释一下其含义比哪sysname是什么意思？