I want to host SQL server from Dynamic ip. Can I host the Sql Server from Dynu subdomain. Like myname.dynu.net so that i can get access to my Local SQL server over Internet.

Yes, you can connect to your SQL server remotely using Dynu dynamic DNS service. You may do the following:

1. Sign up for a DDNS hostname at https://www.dynu.com/en-US/ControlPanel/AddDDNS and run an IP update client in the local network to keep the hostname mapped to the most current IP at all times.
2. Set up port forwarding for the SQL server port (default: 1433) in the router to be forwarded to the same port on the internal IP address of the PC that hosts the SQL server.

You should then be able to connect to the SQL server from a different location.