My mistake; I wasn't aware of the 'using' clause being an alternative syntax for 'on' in MySQL's versio of MySQL. I mostly use DB2 and that is *not* valid in DB2's SQL.
Rhino ----- Original Message ----- From: "Simon Garner" <[EMAIL PROTECTED]> To: <mysql@lists.mysql.com> Sent: Friday, May 06, 2005 7:14 PM Subject: Re: amPiguous! > On 7/05/2005 11:00 a.m., Rhino wrote: > > Actually, the error message is misleading. There is nothing that I would > > call ambiguous in your query: you have a syntax error. The join should be > > written: > > > > select pk from a inner join b on a.col1 = b.col2 > > > > Of course, you need to replace 'a.col1' and 'b.col2' with real column names > > from tables a and b respectively. > > > > Rhino > > Not true, his join syntax is correct. > > select pk from a inner join b using (pk) > > is the same as saying > > select pk from a inner join b on a.pk = b.pk > > However, MySQL is complaining about the "select pk" part because it > doesn't know whether to select a.pk or b.pk. I think what Dan is arguing > is that MySQL should know from the join that a.pk and b.pk are the same, > so it doesn't matter which one it uses. > > -Simon > > > > > > > ----- Original Message ----- > > From: "Dan Bolser" <[EMAIL PROTECTED]> > > To: <mysql@lists.mysql.com> > > Sent: Friday, May 06, 2005 6:50 PM > > Subject: amPiguous! > > > > > > > >>Why are columns included in the join between two tables ambigious? > >> > >>It seems that they should *not* be ambigious! > >> > >>Like this > >> > >>select pk from a inner join b using (pk); > >> > >>ERROR 1052 (23000): Column 'pk' in field list is ambiguous!!! > >> > >>Is this a bug, or is it like this for a reason? It drives me nuts, because > >>it is not ambigious (as far as I can tell). Am I a fool? > >> > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.11.5 - Release Date: 04/05/2005 > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.5 - Release Date: 04/05/2005 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
