When you default install an SQL 2012 R2 server, the database collation is “Latin1_General_CI_AS“. But if you want to install System Center Configuration Manager, one of the prerequisites is that the database collation is “SQL_Latin1_General_CP1_CI_AS“. My SQL server has only one instance, so I had to change the database collation. There are no databases configured yet, so no problem for me at all.
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1.) Make sure you backup all your data!
2.) Attach the SQL 2012 R2 ISO
3.) Run the command prompt as administrator
4.) Type the following command
Setup /QUIET /ACTION=REBUILDDATABASE /INSTANCENAME=InstanceName
/SQLSYSADMINACCOUNTS=accounts /SAPWD= StrongPassword
4.) After the setup has finished, the database collation has changed. You’re now ready to rock!