在Oracle Magazine (现在在线为On Cursor FOR Loops)的一篇旧文章中,Steven Feuerstein展示了使用bulk collect对显式cursor for loops进行优化(在线文章中的清单4): DECLARE
CURSOR employees_cur is SELECT * FROM employees;
TYPE employee_tt IS TABLE OF employees_cur%ROWTYPE INDEX BY PLS_INTEGER;
l_employees employee_tt;
BEGIN
OPEN em
我在Digital Ocean上的邮件服务器有问题。我的邮件服务器使用的是“mail in a box”应用程序。每次,当我尝试发送邮件到例如: some@gmail.com时,我都得到了相同的响应:
Undelivered Mail Returned to Sender
From
MAILER-DAEMON@mail.sporta.io
This is the mail system at host mail.sporta.io.
I'm sorry to have to inform you that your message could not
be delivered t