Question

Is there a way to configure a mysql table so that writing and reading is possible but not deleting?

For example, a table that contains many logs that are legally important and that must never be deleted.

Answer 1

You would just grant the INSERT and SELECT privileges on the table in question (this prevents the possibility of a row being changed)

GRANT INSERT,SELECT ON mydb.mytable 
TO secureduser@localhost 
IDENTIFIED BY 'password';

From this you would go on to add wider permissions to the other tables in the database for this user.

Also, check out the Archive Storage Engine, which is custom designed for this kind of audit-trail application.