Return rate of virtual currency
Publish: 2021-05-16 23:09:06
1. It has to be said that this instry is very close to money, so people often ask how you make money in the instry and how you can make money. Today, let's share some profit models I know<
first line: mining, mining machine, mine (ore pool)
all three are related to mining, but they are also different
Mining: we don't discuss the technical details here. From the perspective of profit, mining has the lowest threshold. Even if we need professional mining machinery now, we can still buy a mining machine to make money. If we become bigger, we can open a mine. Without talking about the risk, mining is the simplest way to make money. The investment cost is low, the rate of return is high, and the time cost is high
mining machinery: the business of manufacturing mining machinery is very hot, and there is a high threshold, so it is difficult for non professionals to become manufacturers. Ant mining machine in the bull market does not worry about selling. Especially after 1994, as far as I know, foreign domestic ore feeders were towed away by trucks. However, the threshold of manufacturers is already very high, and it is difficult for ordinary people to get in touch with them, so there are two dealers. Mining business contact is not much, the second-hand market seems to be very chaotic
mines (ore pools) of course, mines and ore pools are inseparable. Why? The mine pool exists in order to avoid the risk of the mine. The mine pool will pay the cost of the miners according to the time according to the calculation force. Of course, it also needs to draw a percentage, and the miners will be able to keep their income from drought and flood. But the only thing to do is to bring people to the mine. Offline mines are also managed by their own machines, and can also be managed by others. There is a certain threshold, risk and income coexist
second line: information platform, exchange, wallet, currency speculation
consulting platform: something that must exist in the Internet era, providing information and consulting aggregation. The first thing new people come into contact with is information media. In the 17 years since the outbreak of digital currency, bitcoin's Internet search index has exploded. Many people want to know about digital currency, so such an information platform is sure to survive. Drainage, content, value realization and value extension are generally the ways of making profits
exchange: the best understanding is that all flows and proction currencies are for trading. Only when a transaction has a price can it be valued. Many problems will also be found in the transaction, such as the famous "bitcoin expansion". Only by finding and solving problems can the instry develop better. We all know the mode of making money in the exchange. It's the makers who make money. It's just like casinos and securities dealers. They lose more money and earn less, but the exchange is stable. In addition to the handling charges, it seems that the money charge is also a profit model. The threshold of the exchange is also high. In addition to trading risk and platform risk, it pays more attention to policy dynamics. Big exchanges now have "currency exchange", "fire currency" and so on
wallets: both hot and cold wallets are procts, and coin circles are just needed for this kind of procts. Online wallet is generally free, and then through other ways to make money, such as usually do exchanges, or there are investment activities
currency speculation: simple speculation, uncontrollable risk, too many factors affecting the price. We can envy the good luck of others, but we should not hope that we have such good luck. Therefore, there are generally three modes of currency speculation, which can be more "smart" to avoid risks: 1. Fixed investment 2. Quantitative trading 3. Arbitrage: spot move brick, futures arbitrage. Now, it seems that there is a fourth kind of profit margin in the OTC channel.
first line: mining, mining machine, mine (ore pool)
all three are related to mining, but they are also different
Mining: we don't discuss the technical details here. From the perspective of profit, mining has the lowest threshold. Even if we need professional mining machinery now, we can still buy a mining machine to make money. If we become bigger, we can open a mine. Without talking about the risk, mining is the simplest way to make money. The investment cost is low, the rate of return is high, and the time cost is high
mining machinery: the business of manufacturing mining machinery is very hot, and there is a high threshold, so it is difficult for non professionals to become manufacturers. Ant mining machine in the bull market does not worry about selling. Especially after 1994, as far as I know, foreign domestic ore feeders were towed away by trucks. However, the threshold of manufacturers is already very high, and it is difficult for ordinary people to get in touch with them, so there are two dealers. Mining business contact is not much, the second-hand market seems to be very chaotic
mines (ore pools) of course, mines and ore pools are inseparable. Why? The mine pool exists in order to avoid the risk of the mine. The mine pool will pay the cost of the miners according to the time according to the calculation force. Of course, it also needs to draw a percentage, and the miners will be able to keep their income from drought and flood. But the only thing to do is to bring people to the mine. Offline mines are also managed by their own machines, and can also be managed by others. There is a certain threshold, risk and income coexist
second line: information platform, exchange, wallet, currency speculation
consulting platform: something that must exist in the Internet era, providing information and consulting aggregation. The first thing new people come into contact with is information media. In the 17 years since the outbreak of digital currency, bitcoin's Internet search index has exploded. Many people want to know about digital currency, so such an information platform is sure to survive. Drainage, content, value realization and value extension are generally the ways of making profits
exchange: the best understanding is that all flows and proction currencies are for trading. Only when a transaction has a price can it be valued. Many problems will also be found in the transaction, such as the famous "bitcoin expansion". Only by finding and solving problems can the instry develop better. We all know the mode of making money in the exchange. It's the makers who make money. It's just like casinos and securities dealers. They lose more money and earn less, but the exchange is stable. In addition to the handling charges, it seems that the money charge is also a profit model. The threshold of the exchange is also high. In addition to trading risk and platform risk, it pays more attention to policy dynamics. Big exchanges now have "currency exchange", "fire currency" and so on
wallets: both hot and cold wallets are procts, and coin circles are just needed for this kind of procts. Online wallet is generally free, and then through other ways to make money, such as usually do exchanges, or there are investment activities
currency speculation: simple speculation, uncontrollable risk, too many factors affecting the price. We can envy the good luck of others, but we should not hope that we have such good luck. Therefore, there are generally three modes of currency speculation, which can be more "smart" to avoid risks: 1. Fixed investment 2. Quantitative trading 3. Arbitrage: spot move brick, futures arbitrage. Now, it seems that there is a fourth kind of profit margin in the OTC channel.
2.
In the environment of virtual currency trading, the fluctuation of the currency market is weaker day by day. According to Du Dongfeng, an analyst of the medium and long-term currency Commission network, the medium and long-term cycle should be a downward trend of inter district fluctuation. The price fluctuation in the range of 8000-4500 in this year is more likely, and the currency market may continue to fluctuate for a long time. The intraday fluctuation range may shrink again, and the intraday fluctuation range within $100 may become a high probability event! The weakening of the mainstream currency range will undoubtedly affect the profit margin and lengthen the trading time of medium and long-term trading. For investors, the rate of return and capital occupancy will be greatly reced! Therefore, the general virtual currency trading or short-term or into a virtual currency position trading short-term trading trough. But the popularity of virtual currency trading is still on, so users of virtual currency trading are likely to find a neutral proct in the derivatives of virtual currency trading to replace the vacancy of virtual currency position trading. Du Dongfeng, an analyst at cnki.com, believes that short-term trading of virtual currency will be the best choice for the next round of virtual currency fever
what is virtual currency short-term trading
There is no doubt that the short-term transaction of virtual currency can be understood literally as the short-term transaction mode of virtual currency. The short cycle trading mode of virtual currency is a new way to play in the virtual currency market, and it is also a popular derivative proct of virtual currency trading in this year. Its trading mode can be understood as: fixed investment amount to judge the market fluctuation direction of fixed time cycle. Transaction amount and fixed transaction profit and loss can be predicted. It means that transaction costs, gains and losses are controllablefor example: when trading on the short-term trading platform of virtual currency, Xiaoge found that the short-term fluctuation of bitcoin was in a small downward trend at that time (the price of bitcoin was 6666.66 at that time), and predicted that the market would start to fall in five minutes. He made a five minute drop of 100usdt bitcoin at this price, and when the closing price of bitcoin was lower than or equal to 6666.65 five minutes later, Then I can get 180 usdt of income (including 100 usdt of transaction principal). If the closing price is higher than 6666.67 after five minutes, the single transaction will be at a loss
as shown in the figure:
generally, the lowest transaction is from 5usdt, and a single transaction may reach 1000usdt or higher. The transaction time cycle is generally 1, 2, 5, 15, 30 and 60 minutes, and the rate of return is also determined according to the time cycle
I think if we want to keep up with the upsurge of virtual currency, we can pay attention to the short-term transaction of virtual currency! Because in any investment, investors at the forefront are the most profitable and still belong to the first group to eat crabs! More related consulting money commission network, money commission network is not only to provide you with a virtual currency trading platform, but also a virtual currency instry leader! The short-term transaction of virtual currency is undoubtedly the derivative proct of virtual currency transaction, which accelerates the virtual currency transaction to the super short-term stage
3. At the beginning of 1994, the three mavroji brothers, a Russian resident, announced the establishment of an investment fund called mmm, claiming that their goal was to build it into the largest investment fund in Russia. The company assures the public that as long as it invests $100 in mmm, it can recover $500 in half a year. In addition, it has a year-end return of up to 400%! Under such a call, about 15 million people in Russia bought the shares of MMM company. Due to the participation of a large number of shareholders, the share price of MMM investment fund soared from about $1 to $54<
MMM fund raising is another typical pyramid investment fraud. Its operation procere is: after the company sponsors draw up the financing plan, they are committed to tempting investors to participate in the shares, and when the accumulation of funds reaches a certain amount, they begin to use these funds to provide returns to investors, so the cycle is endless. As long as the raised capital reaches a certain scale and can be recycled continuously, it can meet the daily cashing and year-end dividend. However, once investors' confidence shakes, stop investing, sell stocks or ask for cash, the pyramid will collapse, and those shareholders who participate in the investment later will lose their money and become victims of fraud
different from what happened in Albania, the MMM in Russia did not die of oil shortage, but "accidental death". If the Russian federal government had not worried that the development of MMM like funds would have impacted Russian commercial banks and affected the savings rate, mmm would have "survived" longer. On July 22, 1994, the Russian government suddenly made a public statement expressing doubts about the high rate of return of MMM. This news almost immediately led to the "melting" of this appalling "iceberg" in a week.
MMM fund raising is another typical pyramid investment fraud. Its operation procere is: after the company sponsors draw up the financing plan, they are committed to tempting investors to participate in the shares, and when the accumulation of funds reaches a certain amount, they begin to use these funds to provide returns to investors, so the cycle is endless. As long as the raised capital reaches a certain scale and can be recycled continuously, it can meet the daily cashing and year-end dividend. However, once investors' confidence shakes, stop investing, sell stocks or ask for cash, the pyramid will collapse, and those shareholders who participate in the investment later will lose their money and become victims of fraud
different from what happened in Albania, the MMM in Russia did not die of oil shortage, but "accidental death". If the Russian federal government had not worried that the development of MMM like funds would have impacted Russian commercial banks and affected the savings rate, mmm would have "survived" longer. On July 22, 1994, the Russian government suddenly made a public statement expressing doubts about the high rate of return of MMM. This news almost immediately led to the "melting" of this appalling "iceberg" in a week.
4. Whatever the investment project? If its rate of return exceeds the normal level, its risk should be considered. Moreover, it is a bit exaggerated to be several times of the investment principal. Therefore, no matter whether it is able to withdraw cash or not, its rate of return is not attainable and impossible.
when you consider a project with a very high rate of return, someone may be planning your principal, Nine times out of ten, there will be no return. Be careful, there are too many scams now
when you consider a project with a very high rate of return, someone may be planning your principal, Nine times out of ten, there will be no return. Be careful, there are too many scams now
5. ANCC (Article Numbering Center of China, ANCC) China article coding center
ANCC system is a global unified identification system, internationally known as ean · UCC system. According to the EAN · UCC system rules formulated by the international article coding Association and China's national conditions, a set of globally unified proct and service identification system is developed and applied in China
ANCC system is developed on the basis of commodity bar code. It consists of three parts: coding system, automatically identifiable data carrier and EDI standard protocol, as shown in the figure below. These three parts support each other and are closely linked. Coding system is the core of the whole ANCC system, which realizes the unique coding of different items; The data carrier is the carrier that can be read by the naked eye, such as bar code symbol, etc; Then, through the automatic data acquisition technology (ADC) and electronic data interchange (EDI & XML), the automatic operation can be realized with the least manual intervention.
ANCC system is a global unified identification system, internationally known as ean · UCC system. According to the EAN · UCC system rules formulated by the international article coding Association and China's national conditions, a set of globally unified proct and service identification system is developed and applied in China
ANCC system is developed on the basis of commodity bar code. It consists of three parts: coding system, automatically identifiable data carrier and EDI standard protocol, as shown in the figure below. These three parts support each other and are closely linked. Coding system is the core of the whole ANCC system, which realizes the unique coding of different items; The data carrier is the carrier that can be read by the naked eye, such as bar code symbol, etc; Then, through the automatic data acquisition technology (ADC) and electronic data interchange (EDI & XML), the automatic operation can be realized with the least manual intervention.
6. It all depends on cheating. Those special coins are just like Q coins. If someone is willing to charge 2 yuan each, the rate of return of your Q coin is also very high. This kind of thing is called bosha theory, which is to always trick a fool to take the order and see which fool takes the last one.
7. 1.安装oracle 11g
2.Oracle自带的SQL Developer
在安装完Oracle Database 11g Release 2数据库，想试一下Oracle自带的SQL DeveloperW工具，在操作系统菜单的所有程序中找到SQL Developer如下所示，并单击：
结果却提示缺少快捷方式，没找到“SQLDEVELOPER.BAT”，**
在Oracle的安装目录D:\DataBaseInstall\Oralce_11g_r2\proct\11.2.0\dbhome_1\sqldeveloper\sqldeveloper\bin下的确也没找到sqldeveloper.bat文件网上很多人都说重新下载SQL Developer替换掉安装Oracle时自带的那个
重新到Oracle官网下载SQL Developer，当前最新版下载地址：http://download.oracle.com/otn/java/sqldeveloper/sqldeveloper64-3.2.20.09.87-no-jre.zip
将下载下来的 sqldeveloper64-3.2.20.09.87-no-jre.zip解压到Oracle安装目录下
这时重新单击操作系统菜单中的“SQL Developer”，看到命令窗口闪一下就消失了看了一下SQL Developer的“readme.html”文档知道了SQL Developer 3.2支持的Java版本至少要1.6.0_04
那就下载当前最新JDK安装，在这里我下载的是jrockit-jdk1.6.0_37-R28.2.5-4.1.0-windows-x64.exe下载完成后双击出现如下安装界面：
在欢迎窗口中单击“Next”：
设置JDK安装目录，单击“Next”：
这里问你是否需要安装示例或源代码，根据需要选择，这里我就不选了直接单击“Next”：
这里是否安装JRE，选择“Yes”，单击“Next”：
设置JRE安装目录，单击“Next”：
安装过程：
安装完毕，单击“Done”关闭
现在新的JDK安装完后，重新单击操作系统菜单中的“SQL Developer”，这时“SQL Developer”可以启动，但是报了如下的异常：
Exception initializing 'oracle.dbtools.raptor.plsql.PLSQLAddin' in extension 'Or
acle SQL Developer': java.lang.NoClassDefFoundError: com/sun/jdi/Bootstrap
at oracle.jdevimpl.debugger.jdi.DebugJDIConnector.getVersion(DebugJDICon
nector.java:30)
at oracle.jdevimpl.debugger.support.DebugFactory.(DebugFactory.j
ava:81)
at oracle.dbtools.raptor.plsql.PLSQLAddin.initialize(PLSQLAddin.java:97)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddin(AddinManage
rImpl.java:407)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddins(AddinManag
erImpl.java:214)
at oracle.ideimpl.extension.AddinManagerImpl.initProctAndUserAddins(Ad
dinManagerImpl.java:128)
at oracle.ide.IdeCore.initProctAndUserAddins(IdeCore.java:1941)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:1565)
at oracle.ide.Ide.startup(Ide.java:703)
at oracle.ideimpl.DefaultIdeStarter.startIde(DefaultIdeStarter.java:35)
at oracle.ideimpl.Main.start(Main.java:184)
at oracle.ideimpl.Main.main(Main.java:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.ide.boot.PCLMain.callMain(PCLMain.java:62)
at oracle.ide.boot.PCLMain.main(PCLMain.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodA
ccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at oracle.classloader.util.MainClass.invoke(MainClass.java:128) at oracle.ide.boot.IdeLauncher.bootClassLoadersAndMain(IdeLauncher.java: 189) at oracle.ide.boot.IdeLauncher.launchImpl(IdeLauncher.java:89) at oracle.ide.boot.IdeLauncher.launch(IdeLauncher.java:65) at oracle.ide.boot.IdeLauncher.main(IdeLauncher.java:54) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at oracle.ide.boot.Launcher.invokeMain(Launcher.java:713) at oracle.ide.boot.Launcher.launchImpl(Launcher.java:115) at oracle.ide.boot.Launcher.launch(Launcher.java:68) at oracle.ide.boot.Launcher.main(Launcher.java:57)
看着异常就不爽啊，解决呗运行命令行窗口查看是否设置了JDK系统环境变量，这里显然是没有设置JDK系统环境变量：
设置系统环境变量
在桌面选中“计算机”右键选择“属性”，单击“高级系统设置”：
在高级选项卡中单击“环境变量”：
在系统变量下单击“新建”，填入变量名“JAVA_HOME”，变量值为JDK的安装目录，我这里为“ D:\JAVAEEServiceInstall\Java\jrockit-jdk1.6.0_37-R28.2.5-4.1.0 ”，单击“确定”：
在系统变量中找到“Path”，单击“编辑”，在变量值中加入“%JAVA_HOME%\bin”以“;”相隔，单击“确定”：
系统环境变量设置完成后，重新启动命令行窗口，检查是否成功如下为设置成功：
重新单击操作系统菜单中的“SQL Developer”，这时“SQL Developer”可以正常启动：
如果希望不出现“[WARN ][jrockit] MaxPermSize=128M ignored: Not a valid option for JRockit”警告，那用记事本打开SQL Developer的bin目录下的“sqldeveloper.bat”文件，找到“-XX:MaxPermSize=128M”直接删除因为jrockit已经不需要-XX:MaxPermSize这样的参数了
注：1.JDK一定要是1.6版本的即U6版本
2.发现SQL_developer还是会一闪而过，但是SQL_developerW可以方面使用
3.Oracle SQL Developer 添加SQLServer 和Sybase 连接
1. 开始只有oracle 和access 连接
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3. 自动加载到目录，JTDS.jar 下载后就到放这里
我的路径：C:\Documents and Settings\Administrator\Application Data\SQL Developer\
我的JTDS.jar免费下载地址：http://download.csdn.net/detail/kk185800961/5080188
\
4. 完成后添加连接有SQLServer 和Sybase了
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还有一种添加方法是：
1. 帮助——>检查更新
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2. 选择可更新的相关软件查件
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3. 单击下一步自动更新，则出现下列详细插件，选取JTDS JDBC Driver……
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4. 填写在官方网址上的账户信息，确定
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4.sqlserver 转oracle
上一次，我使用手工转换SQL脚本的方式进行数据库的迁移，其间过程相当繁琐，特别是标识符长度的限制让我焦头烂额，因为我们的系统中长标识符真是多如繁星，另外，表结构建好之后，数据的迁移又是一个相当复杂的过程，因为修改了不少的表名，需要把导出的数据和表一一对应上
但是，除了手工的方式之外，其实我们还有更为简便和自动化的解决方案，那就是ORACLE官方提供的Sql Developer自带的Oracle Migration Workbench
什么是Oracle SQL Developer?在官方页面上，是这样介绍它的：
Oracle SQL Developer is a free and fully supported graphical tool for database development. With SQL Developer, you can browse database objects, run SQL statements and SQL scripts, and edit and debug PL/SQL statements. You can also run any number of provided reports, as well as create and save your own. SQL Developer enhances proctivity and simplifies your database development tasks .
另外，通过第三方驱动包，该工具还支持连接和管理各种主流数据库服务器
下面就把我使用这个工具迁移Microsoft SQL Server 2008数据库到Oracle 11G的过程记录下来，为了积累也为分享
第一部分：获取工具
第二部分：建立资料档案库Migration Repository
第三部分：数据库移植向导
第四部分：SqlServer中的架构到Oracle中的模式，名称的处理
第五部分：转移数据
第六部分：存储过程和函数
首先，当然是获得工具，该工具在Oracle Sql Developer官方下载页面里面可以直接下载到Windows 32位直连地址：Windows 32bit Sql DeveloperOracle Sql Developer需要JDK的支持，在下载页面中提供了包含JDK的下载包，还有支持各种操作系统的下载选项
下载后，解压到任意位置直接运行程序第一次运行，需要指定JDK的目录
启动后，我们要做的第一件事，不干别的，先下载SQL SERVER的驱动程序点击菜单帮助，选择检查更新，弹出检查更新向导窗口，第一页一般是废话，直接下一步，等更新中心列表加载完毕后，只选择“Third Party SQL Developer extensions”，点击下一步，等待更新搜索完毕后，中列表中找到并选中 JTDS JDBC Driver，如下图：
image
下一步，在许可协议页面，点击“我同意”按钮后再点下一步，等下载完毕后关闭窗口，弹出提示需要重启程序才能完成更新，点击“是”等程序重启完毕
环境准备完毕，开始进入到正题移植数据库
建立资料档案库Migration Repository
一、连接到Oracle
在程序左边的连接窗口中，点击加号按钮，添加一个到Oracle数据库的dba连接，如下图：
image
配置完成后，
2.Oracle自带的SQL Developer
在安装完Oracle Database 11g Release 2数据库，想试一下Oracle自带的SQL DeveloperW工具，在操作系统菜单的所有程序中找到SQL Developer如下所示，并单击：
结果却提示缺少快捷方式，没找到“SQLDEVELOPER.BAT”，**
在Oracle的安装目录D:\DataBaseInstall\Oralce_11g_r2\proct\11.2.0\dbhome_1\sqldeveloper\sqldeveloper\bin下的确也没找到sqldeveloper.bat文件网上很多人都说重新下载SQL Developer替换掉安装Oracle时自带的那个
重新到Oracle官网下载SQL Developer，当前最新版下载地址：http://download.oracle.com/otn/java/sqldeveloper/sqldeveloper64-3.2.20.09.87-no-jre.zip
将下载下来的 sqldeveloper64-3.2.20.09.87-no-jre.zip解压到Oracle安装目录下
这时重新单击操作系统菜单中的“SQL Developer”，看到命令窗口闪一下就消失了看了一下SQL Developer的“readme.html”文档知道了SQL Developer 3.2支持的Java版本至少要1.6.0_04
那就下载当前最新JDK安装，在这里我下载的是jrockit-jdk1.6.0_37-R28.2.5-4.1.0-windows-x64.exe下载完成后双击出现如下安装界面：
在欢迎窗口中单击“Next”：
设置JDK安装目录，单击“Next”：
这里问你是否需要安装示例或源代码，根据需要选择，这里我就不选了直接单击“Next”：
这里是否安装JRE，选择“Yes”，单击“Next”：
设置JRE安装目录，单击“Next”：
安装过程：
安装完毕，单击“Done”关闭
现在新的JDK安装完后，重新单击操作系统菜单中的“SQL Developer”，这时“SQL Developer”可以启动，但是报了如下的异常：
Exception initializing 'oracle.dbtools.raptor.plsql.PLSQLAddin' in extension 'Or
acle SQL Developer': java.lang.NoClassDefFoundError: com/sun/jdi/Bootstrap
at oracle.jdevimpl.debugger.jdi.DebugJDIConnector.getVersion(DebugJDICon
nector.java:30)
at oracle.jdevimpl.debugger.support.DebugFactory.(DebugFactory.j
ava:81)
at oracle.dbtools.raptor.plsql.PLSQLAddin.initialize(PLSQLAddin.java:97)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddin(AddinManage
rImpl.java:407)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddins(AddinManag
erImpl.java:214)
at oracle.ideimpl.extension.AddinManagerImpl.initProctAndUserAddins(Ad
dinManagerImpl.java:128)
at oracle.ide.IdeCore.initProctAndUserAddins(IdeCore.java:1941)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:1565)
at oracle.ide.Ide.startup(Ide.java:703)
at oracle.ideimpl.DefaultIdeStarter.startIde(DefaultIdeStarter.java:35)
at oracle.ideimpl.Main.start(Main.java:184)
at oracle.ideimpl.Main.main(Main.java:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.ide.boot.PCLMain.callMain(PCLMain.java:62)
at oracle.ide.boot.PCLMain.main(PCLMain.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodA
ccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at oracle.classloader.util.MainClass.invoke(MainClass.java:128) at oracle.ide.boot.IdeLauncher.bootClassLoadersAndMain(IdeLauncher.java: 189) at oracle.ide.boot.IdeLauncher.launchImpl(IdeLauncher.java:89) at oracle.ide.boot.IdeLauncher.launch(IdeLauncher.java:65) at oracle.ide.boot.IdeLauncher.main(IdeLauncher.java:54) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at oracle.ide.boot.Launcher.invokeMain(Launcher.java:713) at oracle.ide.boot.Launcher.launchImpl(Launcher.java:115) at oracle.ide.boot.Launcher.launch(Launcher.java:68) at oracle.ide.boot.Launcher.main(Launcher.java:57)
看着异常就不爽啊，解决呗运行命令行窗口查看是否设置了JDK系统环境变量，这里显然是没有设置JDK系统环境变量：
设置系统环境变量
在桌面选中“计算机”右键选择“属性”，单击“高级系统设置”：
在高级选项卡中单击“环境变量”：
在系统变量下单击“新建”，填入变量名“JAVA_HOME”，变量值为JDK的安装目录，我这里为“ D:\JAVAEEServiceInstall\Java\jrockit-jdk1.6.0_37-R28.2.5-4.1.0 ”，单击“确定”：
在系统变量中找到“Path”，单击“编辑”，在变量值中加入“%JAVA_HOME%\bin”以“;”相隔，单击“确定”：
系统环境变量设置完成后，重新启动命令行窗口，检查是否成功如下为设置成功：
重新单击操作系统菜单中的“SQL Developer”，这时“SQL Developer”可以正常启动：
如果希望不出现“[WARN ][jrockit] MaxPermSize=128M ignored: Not a valid option for JRockit”警告，那用记事本打开SQL Developer的bin目录下的“sqldeveloper.bat”文件，找到“-XX:MaxPermSize=128M”直接删除因为jrockit已经不需要-XX:MaxPermSize这样的参数了
注：1.JDK一定要是1.6版本的即U6版本
2.发现SQL_developer还是会一闪而过，但是SQL_developerW可以方面使用
3.Oracle SQL Developer 添加SQLServer 和Sybase 连接
1. 开始只有oracle 和access 连接
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3. 自动加载到目录，JTDS.jar 下载后就到放这里
我的路径：C:\Documents and Settings\Administrator\Application Data\SQL Developer\
我的JTDS.jar免费下载地址：http://download.csdn.net/detail/kk185800961/5080188
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4. 完成后添加连接有SQLServer 和Sybase了
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还有一种添加方法是：
1. 帮助——>检查更新
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2. 选择可更新的相关软件查件
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3. 单击下一步自动更新，则出现下列详细插件，选取JTDS JDBC Driver……
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4. 填写在官方网址上的账户信息，确定
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4.sqlserver 转oracle
上一次，我使用手工转换SQL脚本的方式进行数据库的迁移，其间过程相当繁琐，特别是标识符长度的限制让我焦头烂额，因为我们的系统中长标识符真是多如繁星，另外，表结构建好之后，数据的迁移又是一个相当复杂的过程，因为修改了不少的表名，需要把导出的数据和表一一对应上
但是，除了手工的方式之外，其实我们还有更为简便和自动化的解决方案，那就是ORACLE官方提供的Sql Developer自带的Oracle Migration Workbench
什么是Oracle SQL Developer?在官方页面上，是这样介绍它的：
Oracle SQL Developer is a free and fully supported graphical tool for database development. With SQL Developer, you can browse database objects, run SQL statements and SQL scripts, and edit and debug PL/SQL statements. You can also run any number of provided reports, as well as create and save your own. SQL Developer enhances proctivity and simplifies your database development tasks .
另外，通过第三方驱动包，该工具还支持连接和管理各种主流数据库服务器
下面就把我使用这个工具迁移Microsoft SQL Server 2008数据库到Oracle 11G的过程记录下来，为了积累也为分享
第一部分：获取工具
第二部分：建立资料档案库Migration Repository
第三部分：数据库移植向导
第四部分：SqlServer中的架构到Oracle中的模式，名称的处理
第五部分：转移数据
第六部分：存储过程和函数
首先，当然是获得工具，该工具在Oracle Sql Developer官方下载页面里面可以直接下载到Windows 32位直连地址：Windows 32bit Sql DeveloperOracle Sql Developer需要JDK的支持，在下载页面中提供了包含JDK的下载包，还有支持各种操作系统的下载选项
下载后，解压到任意位置直接运行程序第一次运行，需要指定JDK的目录
启动后，我们要做的第一件事，不干别的，先下载SQL SERVER的驱动程序点击菜单帮助，选择检查更新，弹出检查更新向导窗口，第一页一般是废话，直接下一步，等更新中心列表加载完毕后，只选择“Third Party SQL Developer extensions”，点击下一步，等待更新搜索完毕后，中列表中找到并选中 JTDS JDBC Driver，如下图：
image
下一步，在许可协议页面，点击“我同意”按钮后再点下一步，等下载完毕后关闭窗口，弹出提示需要重启程序才能完成更新，点击“是”等程序重启完毕
环境准备完毕，开始进入到正题移植数据库
建立资料档案库Migration Repository
一、连接到Oracle
在程序左边的连接窗口中，点击加号按钮，添加一个到Oracle数据库的dba连接，如下图：
image
配置完成后，
8. Unknown_Error
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