title: ORA-20000: Schema "HR" does not exist or insufficient privileges
body: <p>I use Oracle 11g express. I try to install sample database HR. From <strong>cmd</strong></p>
  
  <pre><code>sqlplus
  system
  123456
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/QLC8Y.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QLC8Y.jpg" alt="enter image description here"></a></p>
  
  <p>Error:
  <a href="https://i.stack.imgur.com/dTbLO.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dTbLO.jpg" alt="enter image description here"></a></p>
  
  <pre><code>Comment created.
  
  
  Commit complete.
  
  BEGIN dbms_stats.gather_schema_stats(          'HR'                            ,                granularity =&gt; 'ALL'            ,                cascade =&gt; TRUE                 ,                block_sample =&gt; TRUE            ); END;
  
  *
  ERROR at line 1:
  ORA-20000: Schema "HR" does not exist or insufficient privileges
  ORA-06512: at "SYS.DBMS_STATS", line 3701
  ORA-06512: at "SYS.DBMS_STATS", line 24470
  ORA-06512: at "SYS.DBMS_STATS", line 24435
  ORA-06512: at line 1
  </code></pre>
  
  <p>How I install sample database HR correctly?</p>