Re: no keys...

Each row automatically has an oid assigned to it, which can act as a key. It's
sort of "hidden", but all you have to do is "select oid,* from mytable" to
see it. Then you can delete based on that oid.

Regards,
    Jeff

On Tuesday 16 April 2002 12:31 pm, Dorward Villaruz wrote:
> i have a table where there is no primary key
>
> i have 5 rows of data
>
> day1 time1
> day1 time1
> day1 time2
> day1 time2
> day1 time2
>
> time2 is newer than time1, how should i delete the four oldest record in
> the table. this means that the only row that will be left on my table is:
>
>  day1 time2