http://blog.zol.com.cn/2210/article_2209590.html
/**
* 分表程序
*
* @author Shen Xi [email protected]
* @date 2010-08-19
*/
set_time_limit(0);
$con = mysql_connect("127.0.0.1","root","111111");#创建数据库连接
mysql_select_db ("test",$con);#选择连接数据库“test”
mysql_query("set names gbk");#设置获取数据得字符集
$slctTable = "tb_test";
#获取被分表结构
$sql = "show create table $slctTable";
$result = mysql_query($sql);
$row = mysql_fetch_array($result);
$createTable = $row['Create Table'];
//echo "$createStr
";
#获取被分表字段名
$field = mysql_list_fields("test",$slctTable,$con);
$filedNum = mysql_num_fields($field);
$fieldStr = "";
for($i=0;$i < $filedNum;$i++){
$fieldStr.= "`". mysql_field_name($field, $i)."`,";
}
if(strlen($fieldStr) == 0){
echo "获取表字段有误!";
exit;
}
$fieldStr = "(".substr($fieldStr,0,-1).")";
//echo "$fieldStr
";
//exit;
#查找最大用户id
$sql = "SELECT max(id) as maxid
FROM $slctTable";
$result =mysql_query($sql);
$row = mysql_fetch_row($result);
$maxid = (int)$row[0];
// var_dump($maxid);
//exit;
if($maxid > 1){
$count = ceil($maxid / 1000);
}else{
echo "用户最大id有误";
exit;
}
$per = 500;#每次取得的记录条数
$prefix = "tb_test";
for($i=0;$i<=$count;$i++){
$table = $prefix.$i;
#生成创建新表的sql语句
$createStr = str_replace("CREATE TABLE `$slctTable`","CREATE TABLE IF NOT EXISTS `$table`",$createTable);
$filehandle = fopen ($table.".sql", "a+");
fwrite($filehandle, $createStr."\r\n");
// mysql_query($createStr);
$sql="SELECT COUNT(*) AS num
FROM $slctTable where CEILING(id / 1000)=$i";
$result =mysql_query($sql);
$row = mysql_fetch_row($result);
$num = (int)$row[0];
$maxNum= ceil((int)$num / $per);
for($j=0;$j<$maxNum;$j++){
$lmt = $j * $per;
if($lmt <= (int)$num){
$sql = "select * from $slctTable where CEILING(id / 1000)=$i order by id limit $lmt,500";
// fwrite($filehandle, $sql."");
$inStr="REPLACE INTO ".$table." ".$fieldStr." VALUES";
// fwrite($filehandle, $inStr."\r\n");
$result = mysql_query($sql);
if($result){
$value="";
while ($row = mysql_fetch_row($result)){
$value.= "(";
for($n=0;$n < $filedNum;$n++){
$value.="'".addslashes($row[$n])."',";
}
if(strlen($value)>2){
$value = substr($value,0,-1)."),\r\n";
}
}
if(strlen($value)>2){
$value = substr($value,0,-3)."";
}
$inStr = $inStr.$value;
// echo $inStr."\r\n";
// mysql_query($inStr);
fwrite($filehandle, $inStr);
}
// fclose($filehandle);
// exit;
}else{
break;
}
}
fclose($filehandle);
}
?>