获取超过120000条记录＆amp;执行更新活动停止执行

Question

我在表格中有超过1,20,000条记录

＆安培;我必须取这些＆amp;触发那些记录的UPDATE查询

当我试图在一段时间后执行此活动时，它会暂停执行＆amp;出现“服务不可用”错误。

我已经取得了记录和在while循环中触发更新查询。

我的代码如下：

    $sql_fetch_emails ="SELECT user_id,user_email_id FROM mytable GROUP BY REPLACE(user_email_id, '%40', '@') HAVING COUNT(*) < 2 AND user_email_id LIKE '%\%40%'";

    $rs_fetch_emails = $con->db_query($sql_fetch_emails);

    $get_records_count= $con->db_num_rows($rs_fetch_emails);

    if($get_records_count>=1)
    {
    $i = 0;
    while($user_email_rs = $con->db_fetch_array($rs_fetch_emails))
    {
        $user_id = $user_email_rs['user_id'];
        $email_id = $user_email_rs['user_email_id'];

        $update_qry = "UPDATE mytable SET user_email_id=REPLACE(user_email_id, '%40', '@') where user_id=".$user_id;

        $con->db_query($update_qry);

        $i++;
    }

所以任何人都有解决这个问题的解决方案

请帮帮我