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Oracle数据库 1、 求当前会话的SID
1、 求当前会话的SID，SERIAL#
SELECT Sid, Serial#
FROM V$session
WHERE Audsid = Sys_Context( USERENV , SESSIONID )
单片机开发 －－－－－－－－－－－－－－－－－－－－－－－－ 单片机与PC通信实例 功能：从PC机串口端接收13个字节的数据
－－－－－－－－－－－－－－－－－－－－－－－－
单片机与PC通信实例
功能：从PC机串口端接收13个字节的数据，然后将接收到的数据加上
"Serial Port OK!"的后缀后，发送给PC作为应答
其他书籍 Builder uses to integrate a larger system module. Each component consists of a structured set of fi
Builder uses to integrate a larger system module. Each component
consists of a structured set of files within a directory.
The files in a component directory serve the following
The RS232 UART Core implements a method for communication of serial data. The core provides
a simple register-mapped Avalo ...
Linux/Unix编程 SecureCRT 是高度可定制的终端仿真器
SecureCRT 是高度可定制的终端仿真器，适用于 Internet 和
Intranet，支持 IPv6 标准。对于连接到运行 Windows、UNIX 和 VMS 的
远程系统来说，SecureCRT 是理想的选择。
主要特性：
. 广泛的终端仿真：
VT100，VT102，VT220，ANSI，SCO ANSI，Xterm，Wyse 50/60，
和 Linux console 仿真（带有 ANSI 颜色） ...
其他 The W78E58B is an 8-bit microcontroller which has an in-system programmable Flash EPROM for firmwa
The W78E58B is an 8-bit microcontroller which has an in-system programmable Flash EPROM for
firmware updating. The instruction set of the W78E58B is fully compatible with the standard 8052. The
W78E58B contains a 32K bytes of main ROM and a 4K bytes of auxiliary ROM which allows the
contents of t ...
其他书籍 The Microsoft(R) Guide for Assembly Language and C Programmers By Ray Duncan PROGRAMMING FOR MS-DO
The Microsoft(R) Guide for Assembly Language and C Programmers
By Ray Duncan
PROGRAMMING FOR MS-DOS
Genealogy of MS-DOS
MS-DOS in Operation
Structure of MS-DOS Application Programs
MS-DOS Programming Tools
Keyboard and Mouse Input
Video Display
Printer and Serial Port
File Management
Volumes and Dir ...
汇编语言 Video-DVM is a very cheap DVM that shows how an output as complex as a videocomposite signal can be
Video-DVM is a very cheap DVM that shows how an output as complex as a videocomposite signal can be generated entirely in software: two I/O pins and three resistors are all the hardware required. Connected to any TV set it displays voltages, included max and min peaks, using both giant digits and an ...
单片机开发 三星程式范例
三星程式范例，八位元的
timer, counter, serial I/O, clock switching, power down, key scan, A to D, software generated LCD control, ...
操作系统开发 A user-space device driver can do many of the things that kernel drivers can t, such as perform a lo
A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running computation, block while waiting for an event, or read files from the file system. Unlike kernel drivers, a user-space device driver can use other device drivers--that is, access the networ ...