Re: coalesce

Excerpts from Henry Drexler's message of mié sep 21 12:50:18 -0300 2011:
> thanks,
>
> so I take it I am not getting those more complex examples (that are
> apparently beyond my use case), I will take a look at them again.

Maybe the fix is just to add a simpler example, without altering the
wording (which seems pretty clear to me as well, but then I already know
what COALESCE does).

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Álvaro Herrera <alvherre@commandprompt.com>
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