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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...
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...
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 < %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:,
...
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...
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...
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...
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.
<?xml version="1.0" encoding="UTF-8"?>...
