title: LC_COLLATE and LC_CTYPE support for utf-8 in postgreSQL
body: <p>From this link <a href="http://wiki.postgresql.org/wiki/Todo:Collate">http://wiki.postgresql.org/wiki/Todo:Collate</a> and <a href="http://www.postgresql.org/docs/9.1/static/collation.html">http://www.postgresql.org/docs/9.1/static/collation.html</a>. it's make me confused.</p>
  
  <p>They said, <code>utf-8</code> support depends on OS capability, and its deferent between every <code>LC_COLLATE</code> and <code>LC_CTYPE</code> options.</p>
  
  <p>When I create database using <code>pdAdmin III</code>, there is 3 option, <code>C, Posix and English_United States.1252</code>. What's the different between <code>C, Posix and English_United States.1252</code>?</p>
  
  <p>I want work with all languages supported, that is <code>unicode utf-8</code>, which doesn't seem to be an option.</p>
  
  <p>What I must chose for the values of <code>LC_COLLATE</code> and <code>LC_CTYPE</code> for creating database that support <code>utf-8</code> in <code>PostgreSQL 9</code>?</p>