Column name
Hi,
I am trying to do a 2 joins between 3 tables.
ie)
select <some field>, coalesce(TRR.ABC, SOC.ABC) as newABC, ...
from A join (B join C on (..)) on (..)) as TRR
left join
(D join E on (..)) as SOC on (TRR.Field1=SOC.Field2)
When I run this it says that there is an ambiguous field. Yes after the
join for TRR and SOC they both contain a fields name ABC. How can I
rename this field in the sql statement or how can I make it so the sql
statement know that they are different.
Please help.. .thanks
--
Linh Luong
Computalog Ltd.
Software Developer
Phone: (780) 464-6686 (ext 325)
Email: linh.luong@computalog.com
after the table alias you can rename your cloumns in join:
select <some field>, coalesce(TRR.ABC, SOC.ABC) as newABC, ...
from A join (B join C on (..)) on (..))
as TRR(<new column names>) <-- here
left join
(D join E on (..)) as SOC on (TRR.Field1=SOC.Field2)
----- Original Message -----
From: "Linh Luong" <linh.luong@computalog.com>
To: <pgsql-general@postgresql.org>
Sent: 2001. m�jus 24. 21:58
Subject: [GENERAL] Column name
Show quoted text
Hi,
I am trying to do a 2 joins between 3 tables.
ie)
select <some field>, coalesce(TRR.ABC, SOC.ABC) as newABC, ...
from A join (B join C on (..)) on (..)) as TRR
left join
(D join E on (..)) as SOC on (TRR.Field1=SOC.Field2)When I run this it says that there is an ambiguous field. Yes after the
join for TRR and SOC they both contain a fields name ABC. How can I
rename this field in the sql statement or how can I make it so the sql
statement know that they are different.Please help.. .thanks
--
Linh Luong
Computalog Ltd.
Software Developer
Phone: (780) 464-6686 (ext 325)
Email: linh.luong@computalog.com---------------------------(end of broadcast)---------------------------
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