On 6/25/07, Tim Tsai <[EMAIL PROTECTED]> wrote:
...
> sqlite> select position_payrate, position_payrate - 20000 as diff,
> abs(position_payrate - 20000) as adiff from positions order by adiff asc
> limit 20;
> 20000|0|0
...

http://www.djangoproject.com/documentation/db-api/#extra-select-none-where-none-params-none-tables-none

positions.objects.extra(select={'diff':'position_payrate - 20000',
'adiff':'abs(position_payrate - 20000)'}).order_by('adiff')[:20]

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