cname

一、多表连接查询 　　按照如下命令创建department，employee两个表格： #创建表 create table department( id int, name varchar(20) ); create table employee( id int primary key auto_increment, name varchar(20), sex enum('male','female') not null default 'male', age int, dep_id int ); #插入数据 insert into department values (200,'技术'), (201,'人力资源'), (202,'销售'), (203,'运营'); insert into employee(name,sex,age,dep_id) values ('egon','male',18,200), ('alex','female',48,201), ('wupeiqi','male',38,201), ('yuanhao','female',28,202), ('liwenzhou','male',18,200), ('jingliyang','female',18,204) ; #重点：外链接语法 SELECT 字段列表 FROM 表1 INNER|LEFT

Is there any way to host an entire site on Google Cloud Storage ? That is, map a bucket directly to a top level domain. E.g. create a bucket called mysite.com , then when the user visits mysite.com serve the content directly from cloud storage? I see how to CNAME a subdomain, e.g. static .mysite.com, but can't figure out how to map the top-level domain to a bucket. Any solution? I wanted to do this too. But there is currently no way of binding Google Cloud Storage buckets directly to a top-level domain name, as you found out. The IP addresses where Google Cloud Storage answers web requests

I want to have one user page and multiple project pages hosted by GitHub Pages but available under ONE custom domain (with subdomains for each GitHub Pages repository, of course). So my goals are as follows: One user page ( http://florianwolters.github.com ) available under http://blog.florianwolters.de , http://www.florianwolters.de and http://florianwolters.de . As many project pages as I wish (e.g. http://florianwolters.github.com/pear available under http://pear.florianwolters.de . As of my current understanding, GitHub Pages do only allow ONE CNAME resource record for a page (both user

准备用阿里云的CDN,阿里云已经配置好了，打算先自己测试下再做CNAME解析到阿里云，hosts文件不支持CNAME,只能自己搭建DNS了，选择比较简单的dnsmasq,安装容易配置也简单 系统：CentOS 6.8 DNS: dnsmasq 1.安装dnsmasq yum -y install dnsmasq 2.修改/etc/dnsmasq.conf添加CNAME记录 cname = img.xxxx.com,img.xxx.com.w.kunlungr.com img.xxx.com.w.kunlungr.com是阿里配置好CDN之后生成的域名 3.ping img.xxx.com.w.kunlungr.com获取对应ip,并添加到hosts里 124.232.157.102 img.xxx.com.w.kunlungr.com 4.配置完成启动dnsmasq服务器 /etc/init.d/dnsmasq start dns就配置好了，找台windows，把dns指向这个dns服务器就可以测试CDN了 来源： 51CTO 作者： opsfans 链接： https://blog.51cto.com/13719882/2125413

1.什么是A记录 A记录是IP解析，直接将域名指向某个IP，如果IP有所变动，那么A记录那边也必须更改。 2.什么是CNAME别名解析 CNAME是别名解析，别名解析是先将域名解析到主机别名再转跳到IP，这样主机IP改变了不用重新解析。 3.A记录与CNAME的主要区别 a.cname解析的生效时间要比A记录快，A记录往往要几个小时至48小时，cname几分钟即可 b.如果是A记录，一旦主机的IP发生变化，则必须重新解析；如果是cname解析，则无需重新解析。 4.什么时候用A记录，什么时候用CNAME别名解析 经常换IP，建议用CNAME别名解析，不经常换IP，建议用A记录直接解析到IP。 多线空间，必须用CNAME别名解析。 注：据说百度比较喜欢作A记录IP指向的网站，如果你的顶级域名用的是A记录，带www的二级域名用CNAME别名解析，那么，百度会以为这是两个站，而不是一个站。也就是说，A记录便于百度SEO优化。不过这个还有待验证。 说白了，就是A直接指向，CNAME间接指向 那么回到重点，如何设置二级域名？ 我们添加一个记录，先用CNAME来指向blog子域名 这样的话，blog.banzg.com指向的还是A所指向的IP地址，当然CNAME可以指向其他的别名，如xxx.domain.xxxxxx这种形式的 还可以使用A直接指向IP地址 这样blog.banzg

We are hosting the page of many of our customers. We want to be able to provide our customers with a subdomain of our own domain like customerpages.ourdomain.com so they can create a CNAME to this subdomain. www.customer1.com CNAME customerpages.ourdomain.com. {This will work just fine.} But the situation is I don't know if all our customers will be able to place the following CNAME customer1.com CNAME customerpages.ourdomain.com This last CNAME looks like it's against the RFC of DNS. Any thoughts will be appreciated. No, you can't do that - CNAME records can only exist as single records and