codeigniter database moving to another table

Question

How to solve this codeigniter issue : i have a database table(Mysql) and i need to move all of it\'s field contents to another table using Php Codeigniter framework ?

Wh

Answer 1

A simple one would be

INSERT INTO table1 (col1, col2, col3)
SELECT col1, col2, col3
FROM   table2

In CI use query()

$this->db->query("INSERT INTO table1 (col1, col2, col3)
    SELECT col1, col2, col3
    FROM   table2");

Here is the other way

$data = $this->db->select('col1, col2, col3')->get('table2');
if($data->num_rows())
{
    $insert = $this->db->insert('table1', $data->result_array());
}

Answer 2

First, get content of first table tableFrom and iterate over results to insert them to tableTo. You can use this code in your model. Don't forget $this->load->database(); in your controller or in function.

function insert_into() {
    $q = $this->db->get('tableFrom')->result(); // get first table
    foreach($q as $r) { // loop over results
        $this->db->insert('tableTo', $r); // insert each row to another table
    }
}

@EDIT

Try this code for your controller:

<?php
class fdm extends CI_Controller {
    function __construct() {
        parent::__construct();
        $this->load->library(array('table','form_validation'));
        $this->load->helper('url'); // load model
        $this->load->model('cbc','',TRUE);
    }

    function index() {
        $this->load->database();
        $this->load->model('cbc','',TRUE);

        $this->cbc->insert_into();
    } 
}

To fix error with duplicate entry for key 1 you might want to truncate first table before you import content from table two. You can do this with:

function insert_into() {
    $this->db->truncate('tableTo');
    $q = $this->db->get('tableFrom')->result(); // get first table
    foreach($q as $r) { // loop over results
        $this->db->insert('tableTo', $r); // insert each row to another table
    }
}

Or you could update rows instead of inserting new:

function insert_into() {
        $q = $this->db->get('tableFrom')->result(); // get first table
        foreach($q as $r) { // loop over results
            $this->db->update('tableTo', $r, array('id' => $r->id)); // insert each row to another table
        }
    }