How to copy a table from one mysql database to another mysql database

user_153723 0
Viewed 103293

I need to copy a table from one database to another. This will be a cronjob. Which one is the best way to do it? PHP script or Shell Script. The problem with PHP, both databases has different usernames and passwords so I can't do it like this.

CREATE TABLE db1.table1 SELECT * FROM db2.table1

Should I just connect first DB get all records and insert all to new database using WHILE loop or there is a better way?

I prefer a shell script to do this instead of PHP script.

Thanks

shell linux mysql sql php
12 Answers
exec('mysqldump --user=username --password="password" --host=hostname --database=database table1 table2 > databasedump.sql');

exec('mysql --user=username --password="password" --host=hostname --database=database < databasedump.sql');
user_53598710

As it seems that nobody answered the initial question actually, here is my PHP script to backup a table from a remote MySQL server to a local MySQL server:

function backup_remote_table (
    $remote_db_host, $remote_login, $remote_password, $remote_db_name, $remote_table_name,
    $local_db_host, $local_login, $local_password, $local_db_name, $local_table_name
) {
    // Generating names with time stamps for local database and/or local table, if not available
    if ($local_table_name) {
        $applied_local_table_name = $local_table_name;
    } else {
        $applied_local_table_name = $remote_table_name;
    }
    if ($local_db_name) {
        $applied_local_db_name = $local_db_name;
        if (!$local_table_name) {
          $applied_local_table_name .= date_format(date_create(), '_Y_m_d_H_i_s');
        }
    } else {
        $applied_local_db_name = $remote_db_name . date_format(date_create(), '_Y_m_d_H_i_s');
    }

    // Local server connection
    $local_db_server = mysql_connect($local_db_host, $local_login, $local_password);
    $local_db_server = mysql_query("CREATE DATABASE IF NOT EXISTS " . $applied_local_db_name, $local_db_server);
    mysql_select_db($applied_local_db_name, $local_db_server);

    // Remote server connection
    $remote_db_server = mysql_connect($remote_db_host, $remote_login, $remote_password);
    mysql_select_db($remote_db_name, $remote_db_server);

    // Getting remote table data
    $result_remote_table_info = mysql_query("SHOW CREATE TABLE " . $remote_table_name, $remote_db_server);
    $remote_table_info = mysql_fetch_array($result_remote_table_info);
    $remote_table_description = substr($remote_table_info[1], 13);

    // Creating local table
    $sql_new_table = "CREATE TABLE IF NOT EXISTS " . $applied_local_db_name . "." . $remote_table_description;
    mysql_query($sql_new_table, $local_db_server);

    // Getting all records of remote table
    $result_remote_table_data = mysql_query("SELECT * FROM " . $table_name, $remote_db_server);
    while ($remote_table_row = mysql_fetch_array($result_remote_table_data, MYSQL_ASSOC)){
        // Browsing records of remote table
        $sql_new_row = "INSERT INTO $applied_local_db_name.$applied_local_table_name (".implode(", ",array_keys($remote_table_row)).") VALUES (";
        $extra_sql = "";
        foreach (array_values($remote_table_row) as $value) {
            if ($extra_sql != "") {
                $extra_sql .= ",";
            }
            $extra_sql .= "'";
            $extra_sql .= mysql_real_escape_string($value);
            $extra_sql .= "'";
        }
        $sql_new_row .= $extra_sql . ")";
        // Adding record to local table
        $result_new_table_row = mysql_query($sql_new_row, $local_db_server);
    }
    mysql_free_result($result_remote_table_data);

    return;
}

The solution above is not mine, I got it here, with minor changes.

user_40078690
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