Peter,
>
>First I like to say that your comments are very much appreciated and *should* be appreciated (btw who am I to say; I just jumped into this).

Thank you very much.

>Further, I don't agree 100 % with your last statement, since a compact SQL command can do things which cannot be done in separate lines. Please note that this by itself is not the subject and therefore unimportant, but I just want to be right ;)
>An SQL command can perform recursive stuff which is SO hard to put in normal lines (and recursive function calls) that the latter must be seen as rather impossible. If you really like I could give you an example, but I think you can think of examples already. But again, it is not important to the subject here.

My comments in this area were a generalization. What's more difficult to one person than another is simply a matter of who they are. For example, when I was in my teens, I was in training to do bicycle road racing. I never could get the hang of being able to ride without my hands on the handlebars. Others could do it easily, I couldn't.