PHP mysql从所有表中删除条目 我的数据库中有85个表（员工、访问、培训、通知等） 所有表都有一个字段公共字段工作人员id.m面临删除不需要的记录的问题 是否有任何方法可以从staff id=xyz的85个表中删除记录

试试这个

//Loop through all tables 
set_time_limit(0);
$res = mysqli_query($db,"SHOW TABLES");

while ($row = mysqli_fetch_row($res)) {    
    $table = $row[0];
    //Add created_at column if not exist, else alter the field
    $response = mysqli_query($db,"DELETE FROM " . $table . " WHERE staff_id = xyz");

    if ($response)
        echo "Data deleted from " . $table;
}

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你是说像这样吗

DELETE FROM `entries` WHERE staff_id="spiderman"

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你可以这样做。您已按如下方式联接所有表。在这里，我只加入了上面给定的表格。在删除记录之前还要考虑外键约束

DELETE t1, t2, t3, t4 FROM
  staff as t1
  INNER JOIN  access as t2 on t1.staff_id = t2.staff_id
  INNER JOIN  training as t3 on t1.staff_id=t3.staff_id
  INNER JOIN  notifications as t4 on t1.staff_id=t4.staff_id
  WHERE  t1.staff_id=xyz;

除非像这样尝试：

$tables = array("staff", "access", "training", "notifications");
foreach ($tables as $table) {
    $query = "DELETE FROM $table WHERE staff_id=xyz";
    mysqli_query($db, $query);
}

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您的表是否具有引用完整性，因为您定义了所有外键？是的，所有表都具有引用完整性，并且所有表都通过staff_id连接……如果表之间的关系正确，请尝试级联删除：这样我必须创建t1、t2、t3。。。。。。高达85，m仍在继续添加新表…好的。继续。祝你好运