[Lazarus] Lazarus, Jedi etc.
henry.vermaak at gmail.com
Mon Jul 15 17:34:21 CEST 2013
On Mon, Jul 15, 2013 at 03:44:42PM +0100, Graeme Geldenhuys wrote:
> 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.
I seem to remember something about table columns having default values
in the definition, so perhaps column C defaults to 0? 0 != NULL, so it
didn't break your definition?
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