From: Dave Crooke <dcrooke@gmail.com>
To: Angayarkanni <kangayarkanni@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: How to SELECT
Date: Thu, 11 Mar 2010 01:15:10 -0600
Message-ID: <ca24673e1003102315g699fc0d0sbd3feac4545a6b37@mail.gmail.com> (raw)
In-Reply-To: <2a77004c1003102256l24af41e5ueab35874f5320ffa@mail.gmail.com>
References: <2a77004c1003102256l24af41e5ueab35874f5320ffa@mail.gmail.com>
Hi there
This list is for performance tuning questions related to PostgreSQL ... your
question is a general SQL syntax issue. Also, it's not quite clear from your
message exactly what you are trying to do - it's better to post example
table schemas.
At a guess, I think you might want:
select 1, * from T1
union all
select 2, * from T2
Cheers
Dave
On Thu, Mar 11, 2010 at 12:56 AM, Angayarkanni <kangayarkanni@gmail.com>wrote:
> Hi,
>
> I am the beginner of pgpsql
>
>
> I need to select from two tables say T1,T2 by UNION
>
> when the value is from T1 the output should by a 1 and
> when the value from T2 the out put should be 2
>
> when T1 Hits values should be 1 and when T2 hits the value should be 2
>
>
> or when we use
> COALESCE(is exits value, or this value)
>
> i need
> say_some_function (if value display,1)
>
> results should be as
> 1
> 1
> 2
> 2
> 1
> 1
>
> Is it possible Can any one help me...
>
> Thanks & Regards
> AK
>
>
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To: pgsql-performance@postgresql.org
Cc: dcrooke@gmail.com, kangayarkanni@gmail.com
Subject: Re: How to SELECT
In-Reply-To: <ca24673e1003102315g699fc0d0sbd3feac4545a6b37@mail.gmail.com>
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