simple update from select ??

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От Gary Stainburn
Тема simple update from select ??
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Msg-id 200503071228.39699.gary.stainburn@ringways.co.uk
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Ответы Re: simple update from select ??  (Gary Stainburn <gary.stainburn@ringways.co.uk>)
Список pgsql-sql
Hi folks

I've got a table of pieces of equipment.
One piece of equipment may be owned by another piece of equipment, and 
may own multiple other pieces.

To hold the relationship I have a piece_pieces table holding the owner 
(pp_id) part id and the owned part ids (pp_part).

I'v realised I can store this within the original table so I've added an 
owner attribute.  I need to now populate this now from the other table, 
but I can't work out how.

I've got  pieces table

p_id        -- part id
p_owner    -- new owner attribute

piece_pieces table

pp_id    -- id of owner
pp_part    -- id of owned



-- 
Gary Stainburn
This email does not contain private or confidential material as it
may be snooped on by interested government parties for unknown
and undisclosed purposes - Regulation of Investigatory Powers Act, 2000     



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