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I would think it useful to have 'created' and 'updated' fields, for instance. And silently updating only the first...

• randallsquared 16y ago
  But you can have this: the "created" field is a datetime field, and the "updated" field would be "timestamp". This is far less problematic, in my opinion, than things like requiring a table with exactly one row to do simple selects, or pretending the empty string and null are the same (both of these behaviors are Oracle, by the way, not postgresql).