uRaNGaTaNG » update http://www.rngtng.com TobiTobes Tech Weblog featuring Ruby, Rails, Web development, Arduino, Processing, Geekstuff and more... Thu, 01 Jul 2010 11:36:10 +0000 en hourly 1 http://wordpress.org/?v=3.0 MySQL: How to swap entires of two columns with just one query http://www.rngtng.com/2009/06/24/mysql-how-to-swap-entires-of-two-columns-with-just-one-query/ http://www.rngtng.com/2009/06/24/mysql-how-to-swap-entires-of-two-columns-with-just-one-query/#comments Wed, 24 Jun 2009 13:16:29 +0000 tobi http://www.rngtng.com/?p=134 Check this out, I found out a really nice way how to swap values of two columns with just one query, using user defined variables. Given a table with two columns a and b. To swap their values in whole, use this query:

UPDATE my_table SET a=@tmp:=a, a=b, b=@tmp;

Done! Isn’t that easy?

]]> http://www.rngtng.com/2009/06/24/mysql-how-to-swap-entires-of-two-columns-with-just-one-query/feed/ 0 [update] Mac Os X 10.5.7 is out – all fine except volume control http://www.rngtng.com/2009/05/13/mac-os-x-1057-is-out-all-fine-except-volume-control/ http://www.rngtng.com/2009/05/13/mac-os-x-1057-is-out-all-fine-except-volume-control/#comments Wed, 13 May 2009 20:59:44 +0000 tobi http://www.rngtng.com/?p=88 Yeah Mac Os X 10.5.7 just got released. All fine for me, except my external USB soundcard Terratec Aureon 5.1 can’t be volume controlled anymore – strange!? Any idea what’s wrong?

[update - solved!]
Apparently downgrading the USB Sound kernel back to 10.5.6 Version solves the issue. See the comments and the Apple Discussion-board for more… Thx to sonderpop for that hint!

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