http://blog.dahlia.pe.kr/articles/2008/11/07/postgresql%ec%97%90%ec%84%9c-unique-constraints%eb%8a%94-%ec%83%81%ec%86%8d%eb%90%98%ec%a7%80-%ec%95%8a%eb%8a%94%eb%8b%a4 Programming, Writing, Reading, Thoughts… Wed, 09 Dec 2009 09:52:38 +0000 hourly 1 http://wordpress.org/?v=3.3.1