Question

I am making a PHP web Application in which i am using MySQL as database server, i want to make backup of some tables from one database to another database(with that tables in it).
i have created two different connection, but the table is not updated.

$dbcon1 = mysql_connect(DB_SERVER,DB_USER,DB_PASSWORD) or die(mysql_error());
$dbase1 = mysql_select_db(TEMP_DB_NAME,$dbcon)or die(mysql_error());

$query1=mysql_query("SELECT * FROM emp");

while($row = mysql_fetch_array($query1, MYSQL_NUM))
{
    $dbcon2 = mysql_connect(DB_SERVER,DB_USER,DB_PASSWORD) or die(mysql_error());
    $dbase2 = mysql_select_db(TEMP_DB_NAME2,$dbcon)or die(mysql_error());

    mysql_query("INSERT INTO backup_emp VALUES(null,'$row[1]',$row[2])");
    mysql_close($dbcon2);
}

the code above is taking the data of emp from first database, and updataing it into another backup_emp table of another database.
the code is not working properly, is there any other way of doing this…please help.

Answer 1

If both databases they are on the same server, and the tables have the same schema, then you should use this query instead:

mysql_query("INSERT INTO database2.backup_emp SELECT * FROM database1.emp");

This way you don’t need to worry about multiple database connections.