Re: Newbie wonder...

Bernard,

If you are simply doing a one-time convert of an old database schema to a
new one, simply load the old tables into postgres and then use SQL commands
to insert the data into the new tables. For a sequence on the "existing
table," you can do as above and load the old table or just use copy with the
column names of all columns except the column with the serial values--these
will be auto-incremented.

Sean

----- Original Message -----
From: "Bernard Grosperrin" <bernard(at)bgsoftfactory(dot)com>
To: <pgsql-sql(at)postgresql(dot)org>
Sent: Tuesday, March 08, 2005 6:25 PM
Subject: [SQL] Newbie wonder...

> Please, bear with me, as this is my first post here.
>
> (1) I have a 2 table database, result of a conversion from Access. This
> has
> been made by an amateur, as one of the tables should be at least 3 related
> tables, bunch of redundant data,and the other one 2.
>
> I know I could create a table as the result of a request, so that I could
> isolate these redundant data, but what I don't know is how I would in the
> same time update the original table to put the ID of the matching ROW
> number in the newly created table, instead of the redundant data ?
>
> Should I create a stored procedure for that, and if yes, how ? Or should I
> do that in 2 passes, sequentially ?
>
> (2) How should I go to create a sequence for an existing table? For all
> futures data entry, after this conversion, I want the unique ID for each
> row to come from a sequence, but if I know how to create a table using
> serial, I am not sure how to modify one for this.
>
> Thanks,
> Bernard
>
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