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本版专家分：0结帖率 0% -
安装Mysql 8.0版本，总卡在starting the server 这一步。
尝试多次按照经验删除干净文件和注册表，重新下载安装；
尝试过从program data复制粘贴my.ini文件到server 8.0的文件夹中，解决了找不到服务器的问题。
现在服务器已经成功启动，但仍提示error 1042
错误提示如下：
Beginning configuration step: Starting the server
Attempting to start service Eaven...
Failed to start service Eaven.
Waiting until a connection to MySQL Server 8.0.17 can be established (with a maximum of 10 attempts)...
Retry 1: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 2: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 3: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 4: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 5: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 6: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 7: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 8: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 9: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Waiting 5 seconds before the next connection attempt...
Retry 10: Attempting to connect to Mysql@localhost:3306 with user root with no password...
MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Failed to connect to MySQL Server 8.0.17 after 10 attempts.
Ended configuration step: Starting the server
求求大佬帮忙555 （我要从入门到放弃了T-T）![]()
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版主本版专家分：13328
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- 探花 2018年总版新获得的技术专家分排名第三
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完全删除mysql
1、控制面板里删除mysql相关。
2、删除安装目录文件夹。
3、清理注册表http://jingyan.baidu.com/article/f96699bbaa8fc1894f3c1b5a.html。
4、C:\Windows 目录下，如果有 my.cnf 或 my.ini ，也要删除。新人求助QAQ #include rn#includern#define area(a,b,n) (a*b*sqrt(n))/2rn#define srnint main()rnrn int N,i=1;rn double a,b,c,m,n;rn scanf("%d",&N);rn while(i<=N)rn rn scanf("%lf%lf%lf",&a,&b,&c);rn m=(a*a+b*b+c*c)/2*a*b;rn n=1-m*m;rn printf("%lf",area(a,b,n));rn rn return 0;rnrn这是代码，也没有错误啊，但是编译的时候会有rnduplicate symbol _main in:rn /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/main.orn /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/cc.ornld: 1 duplicate symbol for architecture x86_64rnclang: error: linker command failed with exit code 1 (use -v to see invocation)rn整个是一长串rnLd /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Products/Debug/lasr normal x86_64rn cd "/Users/anetinetta/Library/Mobile Documents/com~apple~CloudDocs/lasr"rn export MACOSX_DEPLOYMENT_TARGET=10.11rn /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -L/Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Products/Debug -F/Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Products/Debug -filelist /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/lasr.LinkFileList -mmacosx-version-min=10.11 -Xlinker -object_path_lto -Xlinker /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/lasr_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -fobjc-arc -fobjc-link-runtime -Xlinker -dependency_info -Xlinker /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/lasr_dependency_info.dat -o /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Products/Debug/lasrrnrnduplicate symbol _main in:rn /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/main.orn /Users/anetinetta/Library/Developer/Xcode/DerivedData/lasr-fwtvgxvysmiglgewhsahmbtjwuim/Build/Intermediates/lasr.build/Debug/lasr.build/Objects-normal/x86_64/cc.ornld: 1 duplicate symbol for architecture x86_64rnclang: error: linker command failed with exit code 1 (use -v to see invocation)rn这些，我有在百度上查过，方法也用了很多种，但是都没有用QAQ，有没有大佬来帮帮我rn
- 小白求助QAQ，从二叉树到二叉搜索树的类的继承，不知道哪错了
- 如图，root是在Binary_tree里定义的，然后Search_tree继承了Binary_tree，可是在Search_tree里用到root的时候，编译器说root没有定义，，这是为什么呢，，[face]monkey:19.gif[/face]rn[img=https://img-bbs.csdn.net/upload/201905/28/1559040220_24078.png][/img][img=https://img-bbs.csdn.net/upload/201905/28/1559040220_212024.png][/img][img=https://img-bbs.csdn.net/upload/201905/28/1559040220_405129.png][/img]
- 技术小白的博客------mysql的安装
- 资源下载 官网下载MySQL 5.5 下载地址：https://dev.mysql.com/downloads/mysql/5.5.html#downloads <em>安装</em>步骤 1、打开下载的mysql-5.5.58-winx64.msi 2、点击next 3、 4、我选择的是默认<em>安装</em>，过程比较简单 5、按照默认一直点下去… 6、运行，输入密码，进入如下页面 tips 错误：双击运行，一闪而过 解决...
- 【求助】安装MySQL出现问题！
- 我以前<em>安装</em>过MySQL，没有什么异样，但是昨天重装系统后再次<em>安装</em>MySQL（因为<em>安装</em>了多少遍了，所以步骤应该没有问题）出了一个不大不小的问题：rn每当MySQL的系统服务启动时，总是在<em>安装</em>分区的根目录（比如我的MySQL<em>安装</em>在E:\MySQL，那么根目录就是E:\）生成两个随机名字的文件，比如tks.1和tks（反正是随机的，每次启动文件名都不同）而且这两个文件无法删除！无法读取！无法访问！只有停止MySQL的服务才自动消失，启动服务就又出现了（名字随机），无论我下载哪个版本的MySQL都是如此！（官方网站下载）请问这是怎么回事？有没有人能帮帮我。rnrn系统：rnwin2000Sever SP4（以前一直好好的）
- [求助]安装mysql失败
- 之前<em>安装</em>过后来重装系统之后就在控制面板卸载了，但是现在要装的时候在配置的最后一步一直是未响应，装了好几次都这样[img=https://img-bbs.csdn.net/upload/201312/22/1387696319_654888.png][/img]
- 安装MySQL出现问题，求助
- 下载了MySQL,<em>安装</em>时遇到这个问题rn[img=https://img-bbs.csdn.net/upload/201410/28/1414504043_499418.png][/img]rn百度搜索出结果可能是重新<em>安装</em>MySQL导致的rn用360软件管家删除后重新<em>安装</em>还是出现同样的现象rn用网上的一些方法结果出现rn[img=https://img-bbs.csdn.net/upload/201410/28/1414504341_585737.png][/img]rn[img=https://img-bbs.csdn.net/upload/201410/28/1414504364_400298.png][/img]rn可能是哪里操作出错吧，求大神指导，越详细越好，最好有图文，拜托。
- ceontOS6.2安装MYSQL求助！
- <em>安装</em>mysql时出现一下提示：rnrn[root@localhost mysql5.5]# rpm -ih MySQL-server-5.5.25-1.linux2.6.i386.rpm rn########################################### [100%]rn file /usr/share/mysql/charsets/README from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/Index.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/armscii8.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/ascii.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp1250.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp1251.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp1256.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp1257.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp850.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp852.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/cp866.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/dec8.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/geostd8.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/greek.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/hebrew.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/hp8.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/keybcs2.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/koi8r.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/koi8u.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/latin1.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/latin2.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/latin5.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/latin7.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/macce.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/macroman.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/charsets/swe7.xml from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/czech/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/danish/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/dutch/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/english/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/estonian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/french/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/german/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/greek/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/hungarian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/italian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/japanese/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/korean/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/norwegian-ny/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/norwegian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/polish/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/portuguese/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/romanian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/russian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/serbian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/slovak/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/spanish/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/swedish/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn file /usr/share/mysql/ukrainian/errmsg.sys from install of MySQL-server-5.5.25-1.linux2.6.i386 conflicts with file from package mysql-libs-5.1.52-1.el6_0.1.i686rn[root@localhost mysql5.5]# service mysql startrnmysql: unrecognized servicern[root@localhost mysql5.5]# mysqlrnERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)rnrn各位知道是什么原因引起的吗？rn
- 小白求助
- 为什么我配置好Java的环境变量后，在命令指示符验证是否成功的时候Javac和Java都没有问题，但Java-version却不是内部命令？
- 小白,求助
- [code=C#] rn stock 类rn/// rn /// 下载状态rn /// rn public enum Ds 初始 = 0, 成功 = 1, 失败 = 2 rnrn /// rn /// 转换状态rn /// rn public enum Ts 初始 = 0, 成功 = 1, 失败 = 2 rnrn /// rn /// 来源网站rn /// rn public enum SourceWebsite 理想论坛, 海风股份论坛, 迈博汇金, 汗牛网, 渐飞数据, 人大经济论坛, 赢富阁, 正点财经, 讯嘉数据, 百思社区 rnrn /// rn /// 论坛表rn /// rn public class Stockrn rn public Stock()rn rn Tstatus = new Dictionary();rnrn Tstatus.Add("默认", Ts.初始);rnrn Reports = new List() new Report Dstatus = Ds.初始 ;rn rnrn /// rn /// IDrn /// rn public SourceWebsite ID get; set; rnrn /// rn /// 信息集合rn /// rn public List Reports get; set; rnrn /// rn /// 转换状态集合rn /// rn public Dictionary Tstatus get; set; rnrn rnrn /// rn /// 信息集合rn /// rn public class Reportrn rn /// rn /// 研报标题rn /// rn public string Title get; set; rnrn /// rn /// 下载网址rn /// rn public string Uri get; set; rnrn /// rn /// 下载时间rn /// rn public DateTime DownloadTime get; set; rnrn /// rn /// 下载状态rn /// rn public Ds Dstatus get; set; rnrn /// rn /// 路径rn /// rn public string Path get; set; rn rnrn[/code]rn[code=C#]rn代码 rn private List test()rn rn List list = new List();rnrn stock.ID = SourceWebsite.百思社区;rn stock.Reports = new List() new Report() Title = "测试1", Dstatus = Ds.成功, DownloadTime = DateTime.Now, Path = "f", Uri = "www.baidu.com" ;rn stock.Tstatus.Add("测试1", Ts.成功);rn list.Add(stock);rn return list;rnrnrn[/code]rn想问下 dataGridView如何绑定，直接绑定test()方法，不行啊rn效果如下rn[img=http://hi.csdn.net/attachment/201201/9/0_1326072230P3PS.gif][/img]rn我的Reports没显示出来，Tstatus也显示的集合rn
- 小白求助！！！！！！！！！！！！！！！！
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- 小白求助！！！
- [code=SQL]rnrncreate table #r(customer int,amount decimal(12,2))rninsert into #rrnselect customer,sum(totalAmount) as amountrnfrom DM_DeliveryOrder arnwhere a.company in (select id from t)rn and convert(varchar(7),a.createTime,120) = convert(varchar(7),'2010-10-12',120)rngornrndeclare @id intrnset @id = 6rn;with t asrn(rn select id,parentIdrn from SM_Companyrn where id = @idrn union allrn select e.id,e.parentIdrn from SM_Company as e join t as f on e.parentId = f.idrn)rnrnselect * from #rrndrop table #rrnrnrn[/code]rnrn报错：对象名 't' 无效。rnrn应该如何写，将t作为临时表的查询条件。
- 小白求助~~
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我们是很有底线的