SQL游标用法的详细解析

DECLARE @username varchar(20),@UserId varchar(100)
DECLARE cursor_name CURSOR FOR --定义游标
  SELECT TOP 10 UserId,UserName FROM UserInfo
  ORDER BY UserId DESC
OPEN cursor_name --打开游标
FETCH NEXT FROM cursor_name INTO @UserId,@username --抓取下一行游标数据
WHILE @@FETCH_STATUS = 0
  BEGIN
    PRINT '用户ID：'+@UserId+'      '+'用户名：'+@username
    FETCH NEXT FROM cursor_name INTO @UserId,@username
  END
CLOSE cursor_name --关闭游标
DEALLOCATE cursor_name --释放游标