title: What are characters not supported in sql char and varchar datatype
body: <p>I have used name column in table. In that column i used varchar for datatype in sql. I have updated query like other languages except English but sql stored that characters as &quot;?&quot;.
  Example :</p>
  <blockquote>
  <p>table : student</p>
  <p>column : name (varchar(50)), id number</p>
  <p>query : <code>update student set name='தமிழ்' where id=10;</code></p>
  <p>ans : ?????</p>
  </blockquote>
  <p>Please say how it can avoid. And please say what are the characters sql varchar datatype store like <code>??</code></p>