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RFC:网络的十二条真理

RFC1925 – The Twelve Networking Truths

Network Working Group                                  R. Callon, Editor
Request for Comments: 1925                                          IOOF
Category: Informational                                     1 April 1996

                      The Twelve Networking Truths

Status of this Memo
本备忘录的状态

   This memo provides information for the Internet community.  This memo does not specify an Internet standard of any kind.  Distribution of this memo is unlimited.
   本备忘录提供了Internet社区的信息,它没有规定任何一种Internet标准,对本备忘录分发不受限制。

Abstract
摘要

   This memo documents [...]

转一篇quest Xpert for PL/SQL 的-------Avoid COUNT(*) Unless Count is Required

之前,我还真没想过用rownum来提高性能。至于用游标循环,倒是很简单。Avoid COUNT(*) Unless Count is RequiredConsider the following requirement:Get the ID for the company which matches specified name.If no match, display error.If more than one match, show list.If single match, [...]