title: What does Rows indicate in the explain plan?
body: <p>This was my query:</p>
  
  <pre><code>SELECT payload_data FROM staging_record WHERE record_source = 11;
  </code></pre>
  
  <p>This was the execution plan:</p>
  
  <pre><code>------------------------------------------------------------------------------------------------
  | Id  | Operation                   | Name             | Rows  | Bytes | Cost (%CPU)| Time     |
  ------------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT            |                  |  9016 |  1875K|   292   (1)| 00:00:05 |
  |   1 |  TABLE ACCESS BY INDEX ROWID| STAGING_RECORD   |  9016 |  1875K|   292   (1)| 00:00:05 |
  |*  2 |   INDEX RANGE SCAN          | IX_RECORD_SOURCE |  9016 |       |    15   (0)| 00:00:01 |
  ------------------------------------------------------------------------------------------------
  
  Predicate Information (identified by operation id):
  ---------------------------------------------------
  
     2 - access("RECORD_SOURCE"=11)
  </code></pre>
  
  <p>I did a count and it returned <code>22619</code> with this query </p>
  
  <pre><code>SELECT COUNT(*) FROM staging_record WHERE record_source = 11;
  </code></pre>
  
  <p>Why does Rows column say 9016 when my count returned 22619. What is <code>Rows</code> refering to here?</p>