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

On Tue, Oct 21, 2014 at 5:02 PM, Charles Wilt <charles.wilt@xxxxxxxxx> wrote:

Interestingly, neither DB2 10.5 for LUW nor DB2 10 for z/OS support the
JOIN USING syntax at all. So I guess it's nice to get something first, but
then of course you get to work the bugs out!

I guess "nice" is one way to look at it.

I've always gotten the impression that DB2's flavor of SQL is more
conservative than others; that it strives to stick to "standard" SQL,
only reluctantly adding "optional standard" features (like USING) and
actively avoiding nonstandard features.

This is good and bad, but I think IBMers tend to focus on the good,
both because that's the database they've got, and because the IBM
culture tends to value conservatism.

I've been trying to go with this flow, and that's one reason why I
specifically recommended not bothering with USING and just using ON.
The other reason is that I prefer having fewer but more general
language constructs. For me, USING just doesn't feel like a big
enough improvement over ON to be worth keeping that extra keyword
around in my vocabulary, which I can't use anyway if I find myself
talking to certain other databases.

John Y.