On 2013-07-15 15:06, Henry Vermaak wrote:
> Could you explain why the above is bad for those of us that aren't DB
> experts?  To my untrained eye it looks fairly plausible, so I'm
> obviously missing something.


I never inserted data into column C, so MySQL decided on its own that it
should magically contain the value 0 — inventing data! Last time I
checked 0 <> null in SQL terms either.

Regards,
  G.





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