Date: Tue, 30 Oct 2018 14:00:09 +0100
From: Christoph Berg <myon@debian.org>
To: Subodh Kumar <subodh.kumar@epps-erp.com>
Cc: pgsql-admin@lists.postgresql.org
Subject: Re: creating table without columns
Message-ID: <20181030130009.GA7596@msg.df7cb.de>
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 <CA+KMk93CwQBP8SMeu_wcGdrj_ZTLVQVDpL-zbCd2vdy0hfWYrw@mail.gmail.com>
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Re: Subodh Kumar 2018-10-30 <CA+KMk93CwQBP8SMeu_wcGdrj_ZTLVQVDpL-zbCd2vdy0hfWYrw@mail.gmail.com>
> Hello Everyone,
>            I have run below query it is created 'test' table without
> columns
>            but table row count is 2.
> please give me clarity about this, i thought it may give syntax error but
> not
> either it must have 2 rows data but both are not happened.
> 
> 
> with ins_test as (select 1 as srno
> union
> select 2)
> select into test from ins_test;

You missed "srno":

with ins_test as (select 1 as srno
union
select 2)
select srno into test from ins_test;
       ^^^^

You can also "select from tbl;" -- omitting the target list.

The easier way to get a table without columns, but with rows is this:

create table test();
insert into test default values;
insert into test default values;

Christoph