數據處理常用方案

添加字段方案：

include  "mysql.inc";
$db_id = mysql_connect($CF_DB_HOST, $CF_DB_USER, $CF_DB_PWD);
mysql_select_db($CF_DB_NAME,$db_id);

set_time_limit(0);
$sql = "select focusid from siteinfo";
$rs = mysql_query($sql,$db_id);
while($row = mysql_fetch_row($rs)){
  $focusid = $row[0];
  $tsql = "describe misprintlog_".$focusid." correctword";
  $tqry = mysql_query($tsql);
  $field = mysql_fetch_row($tqry);
  if($field[0]){
    echo "字段已經存在";
  }
  else{
    $tempsql = "alter table misprintlog_".$focusid." add correctword  varchar(255) default ''";
echo $tempsql."\n";
mysql_query($tempsql,$db_id);
  }
}