a href="#max%2CPostgresQuery%2Cstring"><span class="Identifier">max</span></a><span class="Other">(</span><span class="Identifier">self</span><span class="Other">:</span> <a href="postgres_types.html#PostgresQuery"><span class="Identifier">PostgresQuery</span></a><span class="Other">;</span> <span class="Identifier">column</span><span class="Other">:</span> <span class="Identifier">string</span><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">Future</span><span class="Other"