title: sqlite convert 'dd.MM.yyyy' formated String to date
body: <p>i have a sqlite database on my android, whith a datetime column, that contains a date with the Format dd.MM.yyyy.
  It's not my Database, I'm niot able to change the Dateformat.
  I want to compare the date in the database with a String, which is representing a secon date, but everything I tryed failed.
  How can I convert this column to a valid, compareable date?
  date(), dattime() sdfttime() everything returns NULL.</p>