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One more time on ONE-TO-MANY

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CC me, I'm digesting this list.

From:
   http://www.sum-it.nl/cursus/dbdesign/english/intro030.php3
A quote:
   ' In addition *the database designer chooses* an action for delete:

   * It's /only possible/ to delete a row in the one-table when there a
     no more related many-rows.
   * When deleting a row the RDBMS
     <http://www.sum-it.nl/cursus/dbdesign/english/intro030.php3#rdbms>
     /automatically/ deletes the related data in the many table. This
     is called a /cascaded delete/.
   * When deleting the last 'many' the RDBMS /automatically/ deletes
     the related 'one' row.'

I'm pretty sure that Postgres does not support the last one automatically. I shall have to do that one by either a chron script or a post trigger.

Does anyone have experience with a database that will do the last one, and what database would that be?

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