title: Insert VALUES from query multi row
body: <p>I have a table "RESULT" with this column:</p>
  
  <pre><code>+--------+------+------------+--------+
  | USERID | POIN |    DATE    |  DESC  |
  +--------+------+------------+--------+
  |      1 |   10 | 2015-08-03 | LOGIN  |
  |      1 |   -1 | 2015-08-11 | LOGOUT |
  |      3 |    5 | 2015-08-07 | INVITE |
  |      2 |   30 | 2015-08-15 | LOGIN  |
  |      2 |    5 | 2015-08-17 | INVITE |
  |      2 |    3 | 2015-08-25 | LOGOUT |
  +--------+------+------------+--------+
  </code></pre>
  
  <p>So, I want to insert new values to table "RESULT". So this is new values:</p>
  
  <pre><code>+--------+------+------------+--------+
  | USERID | POIN |    DATE    |  DESC  |
  +--------+------+------------+--------+
  |      1 |    9 | 2015-09-01 | FREE   |
  |      3 |    5 | 2015-09-01 | FREE   |
  |      2 |   38 | 2015-09-01 | FREE   |
  +--------+------+------------+--------+
  </code></pre>
  
  <p>DATE and DESC defined value, but poin is sum result. How to do this in postgresql? </p>