Re: SQL0203 - Name xxxx is ambiguous, when using JOIN USING

There shouldn't be multiple mykey columns...

Once Tblb is joined to tbla, there's only 1 mykey column, which should be
available for joing to tblc USING mykey again...and the end result should
have only 1 mykey column.

The USING cluase used to be broke and didn't work like this. IBM fixed it
at 6.1. I was happy to hear it as it made the syntax I'm trying to use
work. Today it doesn't.

Charles


On Thu, Oct 16, 2014 at 3:25 PM, Alan Campin <alan0307d@xxxxxxxxx> wrote:

You have to give them a reference and say which table the field is coming
from.

select t1.mykey, t1.flda, t2.fldb, t3.fldc
from tbla t1
join tblb t2
on t1.mykey = t2.mykey
join tblc t3
on t1.mykey = t3.mykey


On Thu, Oct 16, 2014 at 1:18 PM, Charles Wilt <charles.wilt@xxxxxxxxx>
wrote:

I'm getting SQL0203 - Name MYKEY is ambiguous
with the following:

select mykey, flda, fldb, fldc
from tbla
join tblb using (mykey)
join tblc using (mykey)
^---cursor positioned here...

I've tried adding parens (in various places), but get the same error.

CREATE TABLE QTEMP/TBLA (MYKEY CHAR (10 ) NOT NULL WITH DEFAULT,
FLDA CHAR (10 ) NOT NULL WITH DEFAULT)

CREATE TABLE QTEMP/TBLB (MYKEY CHAR (10 ) NOT NULL WITH DEFAULT,
FLDB CHAR (10 ) NOT NULL WITH DEFAULT)

CREATE TABLE QTEMP/TBLC (MYKEY CHAR (10 ) NOT NULL WITH DEFAULT,
FLDC CHAR (10 ) NOT NULL WITH DEFAULT)

Running 7.1 TR6
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