> 
> Interestingly - & i'm curious as to why"
> 
> SELECT '1' UNION SELECT 2;
>  ?column?
> ----------
>         1
>         2
> (2 rows)
> 
> SELECT '1' UNION SELECT 1;
>  ?column?
> ----------
>         1
> (1 row)
> 
> 
> I didn't think UNION did an explicit "distinct" - if that is what is 
> happening?
> 

UNION removes duplicates. UNION ALL does not.

James


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