Обсуждение: making two tables with identical schemas appear as one

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making two tables with identical schemas appear as one

От
o.blomqvist@secomintl.com (Otto Blomqvist)
Дата:
Hello !

I have a couple of tables with the same schema that I would like to
query and view as one table. I looked into CREATE VIEW and FULL JOINs
but still can't figure out a good (fast) way of doing this..

Any ideas ?

/Otto Blomqvist

Re: making two tables with identical schemas appear as one

От
Holger Klawitter
Дата:
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Hi,

> I have a couple of tables with the same schema that I would like to
> query and view as one table. I looked into CREATE VIEW and FULL JOINs
> but still can't figure out a good (fast) way of doing this..

It depends on the specific way you want to bring the tables together.
Without more specific information nobody will be able to help.

Somehow I suspect you are looking for UNION:

CREATE VIEW
  bothTables
AS SELECT
  x, y, z
FROM tableA
UNION SELECT
  x, y, z
FROM tableB
;

Mit freundlichem Gruß / With kind regards
    Holger Klawitter
- --
lists <at> klawitter <dot> de
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Re: making two tables with identical schemas appear as

От
John Sidney-Woollett
Дата:
Do you mean

create view MyView as
select * from table1
union
select * from table2;

John Sidney-Woollett

Otto Blomqvist wrote:

> Hello !
>
> I have a couple of tables with the same schema that I would like to
> query and view as one table. I looked into CREATE VIEW and FULL JOINs
> but still can't figure out a good (fast) way of doing this..
>
> Any ideas ?
>
> /Otto Blomqvist
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster

Re: making two tables with identical schemas appear as

От
Alvaro Herrera
Дата:
On Fri, Aug 20, 2004 at 10:40:43AM +0100, John Sidney-Woollett wrote:
> Do you mean
>
> create view MyView as
> select * from table1
> union
> select * from table2;

Be sure to understand the difference between UNION and UNION ALL if you
are going to do this ...

--
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
"No reniegues de lo que alguna vez creíste"