今天在使用mysql数据库查找数据的时候报错,错误信息如下: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'dd' in 'where clause' at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newI…
"ArcGIS Unknown Spatial Reference"问题: shp文件在Arcgis打开后经常因为原有坐标系无法识别而丢失信息,出现以下提示信息: "Unknown Spatial Reference The following data sources you added are missing spatial reference information. This data can be drawn in ArcMap, but cannot be pro…
问题: Cannot access Hessian remote service at [http://....../remote/syllabusService]; nested exception is com.caucho.hessian.io.HessianProtocolException: '?' is an unknown code 解决方法是启用重载,如下: HessianProxyFactory factory = new HessianProxyFactory(); fact…
------------------------------------------------------------------------------ In :: fdiskbsdlabel.h::: error: #error unknown architecture fdiskbsdlabel.c: In function 'bselect': fdiskbsdlabel.c::: error: 'BSD_LABELSECTOR' undeclared (first use in th…
已经测试,可用: 在命令行输入adb shell后输出如下错误: adb server is out of date. killing... ADB server didn't ACK * failed to start daemon * error: unknown host service 解决办法如下: 1>输入netstat -ano查看哪个程序占用了5037端口, TCP 0.0.0.0:49160 0.0.0.0:0 LISTEN…
最近遇到一个问题, update sy_user as a inner join sy_user_charge_log as b on b.username=a.username set reconciliation =0 where root_id = 26 and time between '2016-12-05 14:59:05' and '2016-12-23 18:36:57'; sql运行无问题,可是在thinkphp里面的时候,就报错了1054:Unknown column '…
一直没搞明白这个问题咋出现的,但今天看到一个方法,搞定了!原来是豌豆荚占用了 5037 端口导致. 参见原文章:一个豌豆荚引发的血案——关于ADB server didn't ACK的问题 简单来讲,首先将Windows任务进程中的豌豆荚干掉,如果还是不行,再继续按下列步骤排查. 问题现象: adb server is out of date. killing... ADB server didn't ACK * failed to start daemon * error: unknown …
昨晚至今早,在新的项目中,实现一个小功能,就是当有访问者浏览网页在留言簿留言时,系统把留言内容发送至某一个邮箱或是抄送指定的邮箱中. 使用以前能正常发送邮件的代码,但在新项目中,测试时,就是出现标题的错误:Mailbox unavailable. The server response was: 5.1.1 User unknown 发送邮件的邮箱地址,帐号与密码均是正常的帐号.为何还有User unknown的异常呢? 原来,这个不明用户,不是指发送者的信息,而是收件者是一个异常用户,当时开发…
Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Estimating population means and percents Sampling assumptions: Simple Random Sample (SRS) Large enough so that the probability histo…
严重: Dispatcher initialization failed Unable to load configuration. - [unknown location] at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfig…
– 错误 1402.无法打开项 UNKNOWN\Components\7ABFE44842C12B390AF18C3B9B1A1EE8\54D21D49F3A8C1C49AC11A1B6445A83E.系统错误 5. 请验证您是否具有足够的权限访问该项,或者与技术支持人员联系. 问题描述: WINDOWS SERVER 2008安装SQL SERVER 2008成功后,因某些问题卸载重装,但无论如何也安装不上了.安装过程总是一闪而过. 查看系统日志,报如下错误: 产品: Microsoft S…