> If I have the table t defined as:
>
> a
> ---
> 1
> 1
> 2
>
>
> and I say:
>
> select count(a=1) from t;
>
> should it give me 1 or 2 as a result? I'm getting 2, and I'd think I
> should get 1....
It will give you a result of 3, as a=1 does not toss out rows for which a <>
1.
You would need to add some parameters to limit the rows that count is
countin...
select count(a) from t where a = 1
would give you 2
select count(DISTINCT a) from t where a = 1
would give you 1
>
>
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