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"Dan" == Dan Lewis <> writes:

   >      Perhaps you need to learn more about primary keys, foreign keys,
   > and the relationship that must exist between them. Another topic that
   > would help is normalizing tables. Still another topic is constraints
   > that must be applied to either type of keys. (This one really goes to
   > the error message you got. (I make these suggestions because it is
   > what I had to do to understand tables in a relational database.)
Yes of course, I desperately need to learn more.  But the issue is that
the GUI seems only to set and save relations between primaries keys. Did
you try it out via the GUI, what is your experience?

   >      I am a little curious. Your email address implies you may live in
   > Spain. 

Yes, I do.

   > Your name looks German to me. If you are German, then there is
   > a Base Handbook written in German that you might be able to use. 

Yes again, I am German.
   > Tom might be able to tell you from where to download it on the
   > LibreOffice wiki if that would help.
That would be extremely helpful. I googled around of course but mostly
found old material (2007/08).

   >      As far as MySQL problems, I think I tried to modify fields in a
   > table while using MySQL. They were not saved either.

Aha so there is a problem?!


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