PHP 中的一些快速方法:

Something quick in PHP:

<?php
$connection = mysql_connect("mysqlserver.example.com", "username", "password");
mysql_select_db("dbname");
$sql = "SELECT `blob_column`, `id` FROM `mytable`";
$result = mysql_query($sql);
while ($row = mysql_fetch_assoc($result)){
    file_put_contents("file" + $row["id"] + ".dat", $row["blob_column"]);
}
mysql_close($connection);

您可能可以使用任何必须访问 MySQL 的方法来做一些类似的事情，但是 AFAIK，没有办法使用纯 SQL 来做到这一点.

You could probably do something simular with whatever method you have to access MySQL, but AFAIK, there's no way to do it with pure SQL.