>>>> 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.) -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
