Well, while we're on the subject of SQL style, can anyone tell me why I'm always seeing people prefixing the name of a table with something like "tbl?"
For example: create table tblCUSTOMERS ( ... ); Seems to me that you should probably know that CUSTOMERS is a table, or is it just me? Looking forward to your input. Mike. On Thursday 04 August 2011 6:43:55 am David Lerer wrote: > I agree. I use the same column name in all tables where it has the same > function - but I consistently add a suffix or prefix. And yes, it is the > old fashion way.... David. > > -----Original Message----- > From: h...@tbbs.net [mailto:h...@tbbs.net] > Sent: Thursday, August 04, 2011 8:26 AM > To: r...@grib.nl > Cc: mysql@lists.mysql.com > Subject: Re: Too many aliases > > >>>> 2011/08/03 12:46 +0200, Rik Wasmus >>>> > > But the > main thing is it helps to distinguish tables in joins having the same > table > more then once (and of course results from subqueries etc.): > > SELECT first.* > FROM tablename first > LEFT JOIN tablename second > ON first.some_id = second.some_id > AND first.id != second.id > WHERE second.id IS NULL > <<<<<<<< > Well, yes, here it is needful. But it seems to me from most of the > examples that people here post, that they have the idea that it is the > style always to use one-letter aliases, whether it is helpful or not. > > Now I do not do this, but I often see examples where a field for one > purpose has in one table one name, and in another table another, > slightly different, name, and then, too, I see alias used, although, in > this case, no table name at all is needed. (I like to use the same field > name in all tables where it has the same function.) -- Take care and have fun, Mike Diehl. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
