title: INSERT OR IGNORE INTO doesn't work
body: <p>I have a table created as:</p>
  
  <pre><code>create table association (_id integer unique primary key autoincrement , id_rules integer, id_places integer)";
  </code></pre>
  
  <p>To avoid replication of entry, I use the statement INSERT OR IGNOR, but it doesn't work. For example,
  value (id_rules , id_places) = ("11","1") alredy in table, but using:</p>
  
  <pre><code>INSERT OR IGNORE INTO association (id_rules , id_places) VALUES ("11","1")
  </code></pre>
  
  <p>a new row is created.
  Please, do anyone Know hwere is my mistake? </p>