Default Custom Fields, “Default” Post

Hello,

I have accidently deleted the default custom fields.
Where are they defined in the database? I mean the fields that are on the default “write page”.

And would it be possible to make a default post? I’m using WP as a CMS and every post is supposed to have to the same content. Sounds strange but I need it that way ??

Help is appreciated!
thanks,
Oliver