Обсуждение: Copying rows between tables?

I know I can select from one table into a new table, but is
there a way to select from one table into an existing table
(aside from copying everything to a file, editing the file
and then copying from that file)?  Without destroying existing
entries, of course...

I have an application where old records are archived into
'archive' tables.  Occasionally there is a need to copy
some of these old records into the 'active' table.

Thanks for any pointers!
Steve
-- 
Steve Wampler -- swampler@noao.edu
The gods that smiled on your birth are now laughing out loud.

----- Original Message ----- 
From: "Steve Wampler" <swampler@noao.edu>
To: "Postgres-SQL" <pgsql-sql@postgresql.org>
Sent: Tuesday, January 13, 2004 18:23
Subject: [SQL] Copying rows between tables?


>
> I know I can select from one table into a new table, but is
> there a way to select from one table into an existing table
> (aside from copying everything to a file, editing the file
> and then copying from that file)?  Without destroying existing
> entries, of course...

INSERT INTO table1(row1, row2)
SELECT row1, row2 FROM archive_table;

>
> I have an application where old records are archived into
> 'archive' tables.  Occasionally there is a need to copy
> some of these old records into the 'active' table.
>
> Thanks for any pointers!
> Steve
> -- 
> Steve Wampler -- swampler@noao.edu
> The gods that smiled on your birth are now laughing out loud.
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: the planner will ignore your desire to choose an index scan if your
>       joining column's datatypes do not match

On Tue, Jan 13, 2004 at 09:23:48AM -0700, Steve Wampler wrote:
> 
> I know I can select from one table into a new table, but is
> there a way to select from one table into an existing table
> (aside from copying everything to a file, editing the file
> and then copying from that file)?  Without destroying existing
> entries, of course...

insert into desttable (col1, col2, col3)
select col1, col2, col3 from sourcetable
where somecol = somevalue;


-- 
__________________________________________________
"Nothing is as subjective as reality"
Reinoud van Leeuwen    reinoud.v@n.leeuwen.net
http://www.xs4all.nl/~reinoud
__________________________________________________

Dear Steve Wampler

>I have an application where old records are archived into
>'archive' tables.  Occasionally there is a need to copy
>some of these old records into the 'active' table.
>  
>
source_table(id: bigserial,uname: char,x1: char,x2: char,x3: char,x4: char)
dest_table(id: bigserial,uname: char,x11: char,x21: char,x31: char,x41: 
char)

you will do some thing like
insert into dest_table(id,uname,x11,x21) (select id,uname,x1,x2 from 
source_table)

Shootback if this helps


Regards,
Vishal Kashyap