Thanks... like so many other things, that seems obvious now.
On 25 Feb 2004, at 21:22, Jim Wilson wrote:
> Like this:
>
> select tq1.timestamp as t, tq1.value as q1, tq2.value as q2,
> tq3.value as q3, tq4.value as q4 from
> cal_quat_1 tq1, cal_quat_2 tq2, cal_quat_3 tq3, cal_quat_4 tq4
> where tq1.timestamp = tq2.timestamp
> and tq2.timestamp = tq3.timestamp
> and tq3.timestamp = tq4.timestamp
> and tq1.timestamp > '2004-01-12 09:47:56.0000 +0'::timestamp with
> timezone
> and tq1.timestamp < '2004-01-12 09:50:44.7187 +0'::timestamp with
> timezone
> order by tq1.timestamp;
>
> The "and" makes anything more reduntant.
>
> Best,
>
> Jim Wilson