In SQL Server Installation Centre click on “Installation”
Click on “New SQL Server stand-alone installation or add features to an existing installation”
Note that if you have any of previous versions of SQL Server installed on your machine the setup process will fail because this release of SQL Server cannot be installed in until the existing instances of SQL Servers are uninstalled.
If you click on “Failed” you can read the complete error message that is “Previous SQL product installation failed. A SQL product other than SQL Server 2014 CTP1 is detected. You cannot install this release until the existing instances of SQL products are uninstalled.”
What does it actually mean that the database doesn’t have a database owner?! It seems odd, but, it is possible. In some cases that the database is created by an application it really happens that the database doesn’t have any database owner. For instance, the databases generated by CRM Deployment Manager doesn’t have database owner. So what if we had a bunch of databases in the SQL Server that doesn’t have any database owners? Okay, let me explain. I’ve faced to a situation that we needed to create some database diagrams for many databases and all of those databases where CRM databases created by CRM Deployment Manager. Hence, when we were trying to generate a database diagram an error message were raising saying the database doesn’t have DB owner. So it was very time consuming if we wanted to define a DB owner for each database individually using the GUI. The following code will define a particular database owner for the databases server wide. (In our situation it was a service user.)