Atributos da tabela leiturajoao<br><br>
<table border=2>
<tr>
<th>Nome</th>
<th>Tipo</th>
<th>Null</th>
<th>Chave</th>
<th>Padrão</th>
<th>Extra</th>

</tr><tr><td>idleiturajoao</td><td>int(10) unsigned</td><td>NO</td><td>PRI</td><td></td><td>auto_increment</td></tr><tr><td>macjoao_idmacjoao</td><td>varchar(17)</td><td>NO</td><td>MUL</td><td></td><td></td></tr><tr><td>nome</td><td>varchar(50)</td><td>YES</td><td></td><td></td><td></td></tr><tr><td>datahora</td><td>datetime</td><td>YES</td><td></td><td></td><td></td></tr><tr><td>valor</td><td>double</td><td>YES</td><td></td><td></td><td></td></tr><tr><td>pressao</td><td>double</td><td>YES</td><td></td><td></td><td></td></tr><tr><td>volume</td><td>double</td><td>YES</td><td></td><td></td><td></td></tr><tr><td>temperatura</td><td>double</td><td>YES</td><td></td><td></td><td></td></tr></table>