我对这两个结构很困惑。这两个表的优点和缺点是什么？哪个更好，为什么？表1id,name,age,birthdate,addresssomedata1somedata1somedata1somedata1somedata1somedata2somedata2somedata2somedata2somedata2somedata3somedata3somedata3somedata3somedata3表2id,col_name,col_valuesomedatanamesomedatasomedataagesomedatasomedatabirthdatesomedatasomedataa