From: | Keith Gray <keith(at)heart(dot)com(dot)au> |
---|---|
To: | Jason Kwok <jason(at)newhonest(dot)com> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Recursive select |
Date: | 2001-10-29 22:09:31 |
Message-ID: | 3BDDD39B.89A2A19C@heart.com.au |
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Thread: | |
Lists: | pgsql-sql |
Jason Kwok wrote:
>
> I have a table :
>
> MyID parentID
> ================
> 5 6
> 6 7
> 3 13
> 7 3
>
> Is there any simple select statement that can get all rows with MyID = 5 and
> all its parents?
> That means 5's parenet is 6, 6's parent is 7, 7's parent is 3.....
>
I had a similar problem a couple of weeks back.
The only way I could get around it was "programmatically".
This is an iterative (loop) problem.
Because I am writing for several brands/flavours of database
I solved it in VB, but some solutions (for postgres only)
are offered using functions or triggers in PgSQL.
--
Keith Gray
Technical Development Manager
Heart Consulting Services P/L
mailto:keith(at)heart(dot)com(dot)au
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