Change all db owners to 'sa'

sp_helpdb
go
EXEC master..sp_MSForEachDB '

if(''?'' not in (''master'',''msdb'',''tempdb'',''model''))
begin
print ''use ''+''?''
print ''go''
print ''exec sp_changedbowner sa''
print ''go''
end
'
go

sp_helpdb
go