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RFC：网络的十二条真理

By goodbee On 2009-09-02 · Leave a Comment

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.  [...]

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

By goodbee On 2006-11-29 · Leave a Comment

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, return…

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