Rename SQL Server DB through SP

sp_renamedb Changes the name of a database.

Syntaxsp_renamedb [ @dbname = ] 'old_name' , [ @newname = ] 'new_name'
Arguments[@dbname =] 'old_name'

Is the current name of the database. old_name is sysname, with no default.
[@newname =] 'new_name'

Is the new name of the database. new_name must follow the rules for identifiers. new_name is sysname, with no default.

Return Code Values 0 (success) or a nonzero number (failure)

PermissionsOnly members of the sysadmin and dbcreator fixed server roles can execute sp_renamedb.

Examples
EXEC sp_renamedb 'user', 'useraccounts'

This example changes the name of the user database to useraccounts.