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Modbus硬件控制02——modbus继电器 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...置均通过485通信口进行设置,且可通过产品上的按键进行重置为默认设置,即为9600波特率,8个数据位,偶校验,1个停止位。 二、模块功能 本模块具备一路数字输入和一路数字输出,还具备一个标准的 RS-485 通讯接口,通信...
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Are table names in MySQL case sensitive?

Are table names in MySQL case sensitive? 5 Answers 5 ...
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c/c++如何获取CPU的序列号? - C/C++ - 清泛网 - 专注C/C++及内核技术

c/c++如何获取CPU的序列号?获取CPU序列表的完整实例代码如下:#include "stdafx.h"#include <afx.h>CString GetCpuSerial(){unsigned long st1 = 0;un...获取CPU序列表的完整实例代码如下: #include "stdafx.h" #include <afx.h> CString GetCpuSerial() { unsigne...
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Get current batchfile directory

... Look, I do not need to run stm.sql in D:\Dir1\Dir2\stm.sql. I need mysql.exe -u root -p mysql &lt; %cd%\stm.sql to execute that stm.sql commands. – Hamed Kamrava Jun 12 '13 at 11:32 ...
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mysql_config not found when installing mysqldb python interface

...cript to run on the linux server I'm connected to via ssh. The script uses mysqldb. I have all the other components I need, but when I try to install mySQLdb via setuptools like so:, ...
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如何查看Oracle用户的SQL执行历史记录? - 数据库(内核) - 清泛网 - 专注C/...

如何查看Oracle用户的SQL执行历史记录?select * from v$sqlarea t order by t LAST_ACTIVE_TIME desc注意 :执行此语句等等一些相关的语句 必须具有DBA 的权限 虽然 select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc 注意 :执行此语句等等一些相...
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linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...tables -Z -t nat 2,添加规则 添加基本的NAT地址转换,(关于如何配置NAT可以看我的另一篇文章), 添加规则,我们只添加DROP链.因为默认链全是ACCEPT. 防止外网用内网IP欺骗 [root@tp sysconfig]# iptables -t nat -A PREROUTING -i eth0 -s 10.0.0.0/8 -j DRO...
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如何把一个POINT转化为lParam参数 - C/C++ - 清泛网 - 专注C/C++及内核技术

如何把一个POINT转化为lParam参数MAKELPARAM(pt.x, pt.y);反之:CPoint point(lParam);里面的实现是:CPoint(_In_ LPARAM dwPoint) throw();...ATLTYPES_INLINE CPoin...MAKELPARAM(pt.x, pt.y); 反之: CPoint point(lParam); 里面的实现是: CPoint(_In_ LPARAM dwPoint) thro...
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mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to

I am trying to select data from a MySQL table, but I get one of the following error messages: 31 Answers ...
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How to print a query string with parameter values when using Hibernate

...ase.url=jdbc:log4jdbc:hsqldb:mem:db_name #Hsql #database.url=jdbc:log4jdbc:mysql://localhost:3306/db_name My logback.xml configuration file looks like the below: this outputs all SQL statements with parameters plus the resultset tables for all queries. &lt;?xml version="1.0" encoding="UTF-8"?&gt...