title: SQL: using WHERE AND instead of HAVING
body: <p>here's an example of a SQL statement where we use <code>HAVING</code>:</p>
  
  <pre><code>select column1 from table1
  where condition1
  having condition2;
  </code></pre>
  
  <p>isn't it the same exact thing if we do this:</p>
  
  <pre><code>select column1 from table1
  where condition1 AND condition2;
  </code></pre>
  
  <p>what is the difference between these two?</p>