标签:code desc archive time sort cursor com index user
1.声明游标
DECLARE 游标名 CURSOR SELECT语句(注:此处一定是SELECT语句)
2.打开游标
OPEN 游标名
3.读取游标数据
Fetch [Next | Prior | First | Last | Absolute n | Relative n ] From 游标名 INTO @name1,@name2...
WHILE(@@FETCH_STATUS = 0)
BEGIN
--要执行的SQL语句
FETCH NEXT FROM 游标名
END
4.关闭游标
CLOSE 游标名。关闭后不能对游标进行读取等操作,但可以使用OPEN语句再次打开
5.释放游标
DEALLOCATE 游标名。即删除游标,不可再使用
例子:
declare @index int; declare @userId uniqueidentifier; set @index=1; declare user_cur cursor for select UserId from T_User order by CreateTime desc open user_cur fetch next from user_cur into @userId while (@@FETCH_STATUS=0) begin update T_User set Sort=@index where UserId=@userId; set @index=@index+1; fetch next from user_cur into @userId end close user_cur; deallocate user_cur;
参考链接:http://www.cnblogs.com/youngberry/archive/2009/07/17/1525647.html
标签:code desc archive time sort cursor com index user
原文地址:http://www.cnblogs.com/Gylianger/p/6935499.html