| From: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
|---|---|
| To: | Patrick B <patrickbakerbr(at)gmail(dot)com>, pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Select from tableA - if not exists then tableB |
| Date: | 2017-05-08 22:01:32 |
| Message-ID: | cbd430e2-bc54-bfb8-b3b8-ba0b7f45a213@aklaver.com |
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| Lists: | pgsql-general |
On 05/08/2017 02:56 PM, Patrick B wrote:
> Hi guys,
>
> I have two tables that supports the same data, but different table DDL
> (We are migrating all the data from one to another).
>
> What I need is basically:
>
> 1. Query looks for the data on table A,
> 2. if it doesn't find it on table A, go look for it on table B
>
> Now, how could I do that in a Select? Can you please provide some examples?
If you can provide some information:
1) The table schema
2) How the data is related between the two tables.
>
>
> I'm using PostgreSQL 9.1.
>
> Thanks
> Patrick
--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com
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