Question:How to reference two table when lack reference column. Example: 1.Create two tables the one of  lack reference column. CREATE TABLE t1( t_id NUMBER, t_age NUMBER );INSERT INTO t1 VALUES(1,24);COMMIT; CREATE TABLE t2( t_name VARCHAR2(20) ); I…

1.错误描述 1 queries executed, 0 success, 1 errors, 0 warnings 查询:SELECT a.createUserId AS typeId, (SELECT COUNT(c.id) FROM t_aps c WHERE c.`status` IN (2, 5) AND c.createTime >= start... 错误代码: 1247 Reference 'startTime' not supported (forward reference…

之前在自己的项目中添加了一个分支,然后做了一些操作,比如同步本地的分支情况到远程仓库中,然后在远程仓库中完成分支合并,以及 Pull request 等等操作,后来,在本地仓库中进行 git fetch命令操作的时候,出现了一个错误,即 error: cannot lock ref 'refs/remotes/origin/master': unable to resolve reference 'refs/remotes/origin/master': reference broken 下面是…

Xcode更新到7.3后会出现NSObject+MJProperty.h报Cannot create __weak reference in file using manual reference counting错误信息. 解决的办法:在Build Settings--------->Aplle LLVM7.1 - Language - Objectibe-C------------->Weak Reference In Manual Retain Release设置为YES.…

Ubuntu(版本16.04)下默认配置编译Ffmpeg(版本4.1.3configure 添加选项--enable-threads),将编译好的ffmpeg库添加到程序 中进行编译出现undefined reference to pthread_once ,undefined reference  to uncompress 等错误,提版本示pthread_once 未定义原因是编译链接时找不到pthread_one.解决的方法是安装pthread并将它链接到程序.具体安装的命令是: sudo…

Linux Ubuntu运行线程程序出现undefined reference to ‘pthread_create’和undefined reference to ‘pthread_join’错误. 编写好线程代码,进行编译 gcc xiancheng.c -o xiancheng 出现下面提示 linux@ubuntu64-vm:~/workdir$ gcc xiancheng.c -o xiancheng /tmp/ccOCxLrd.o: In function `main': xianc…

alter table fx.pet modify column `species` varchar(20) binary;…

  原帖地址 http://stackoverflow.com/questions/36147625/xcode-7-3-cannot-create-weak-reference-in-file-using-manual-reference-counting activeoldestvotes up vote87down voteaccepted Set Build Settings -> Apple LLVM 7.1 - Language - Objective C -> Weak Refe…

(为知笔记copy过来格式有变,希望对遇到此问题的童鞋有帮助) 具体错误: Thank you for choosing Sphinx! [root@vm-vagrant csft-4.1]# make && make install Making all in src make[1]: Entering directory `/home/wwwroot/softsrc/coreseek-4.1-beta/csft-4.1/src' /bin/sh svnxrev.sh .. make a…

解决的办法:在Build Settings--------->Aplle LLVM8.0 - Language - Objectibe-C------------->Weak Reference In Manual Retain Release 设置为YES.…