title: Materialized Views force and complete
body: <p>What is the difference between force and complete refreshes in Materialized Views</p>
  
  <pre><code>CREATE MATERIALIZED VIEW MV1 REFRESH FORCE ON DEMAND AS SELECT * FROM T1;
  CREATE MATERIALIZED VIEW MV1 REFRESH COMPLETE ON DEMAND AS SELECT * FROM T1;
  CREATE MATERIALIZED VIEW MV1 REFRESH ON DEMAND AS SELECT * FROM T1;
  </code></pre>
  
  <p>Need Just a brief difference between these statements?</p>