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: hsv@stripped [mailto:hsv@stripped]
> Sent: Thursday, August 04, 2011 8:26 AM
> To: rik@stripped
> Cc: mysql@stripped
> 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.
