里的值如何用INSERT存入SQL数据库?
<select name="year">
<option>2003</option>
<option>2002</option>
<option>2001</option>
</select>
<select name="month">
<option>12</option>
<option>11</option>
<option>10</option>
</select>
<select name="day">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
----------------------------------------
sql="insert into data (year,month,day) values ('????','????','????')"
这里的“???”要怎么写?