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   3     Rows can be removed from a table using the <code class="command">DELETE</code>
   4     command.
   5     Suppose you are no longer interested in the weather of Hayward.
   6     Then you can do the following to delete those rows from the table:
   7 </p><pre class="programlisting">
   8 DELETE FROM weather WHERE city = 'Hayward';
   9 </pre><p>
  10
  11     All weather records belonging to Hayward are removed.
  12
  13 </p><pre class="programlisting">
  14 SELECT * FROM weather;
  15 </pre><p>
  16
  17 </p><pre class="screen">
  18      city      | temp_lo | temp_hi | prcp |    date
  19 ---------------+---------+---------+------+------------
  20  San Francisco |      46 |      50 | 0.25 | 1994-11-27
  21  San Francisco |      41 |      55 |    0 | 1994-11-29
  22 (2 rows)
  23 </pre><p>
  24    </p><p>
  25     One should be wary of statements of the form
  26 </p><pre class="synopsis">
  27 DELETE FROM <em class="replaceable"><code>tablename</code></em>;
  28 </pre><p>
  29
  30     Without a qualification, <code class="command">DELETE</code> will
  31     remove  <span class="emphasis"><em>all</em></span>  rows from the given table, leaving it
  32     empty.  The system will not request confirmation before
  33     doing this!
  34    </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="tutorial-update.html" title="2.8. Updates">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="tutorial-sql.html" title="Chapter 2. The SQL Language">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="tutorial-advanced.html" title="Chapter 3. Advanced Features">Next</a></td></tr><tr><td width="40%" align="left" valign="top">2.8. Updates </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> Chapter 3. Advanced Features</td></tr></table></div></body></html>