applying multiple order by in codeigniter

In CodeIgniter, applying multiple ORDER BY clauses involves using the order_by() method multiple times in the model to specify multiple sorting criteria for a database query. Each order_by() call allows you to add an additional sorting condition to the SQL query.

Here's an example of how you can apply multiple ORDER BY clauses in CodeIgniter:

$this->db->select('*');
$this->db->from('your_table');
$this->db->order_by('column1', 'asc');
$this->db->order_by('column2', 'desc');
$query = $this->db->get();

Explanation:

  1. $this->db->select('');: Specifies the columns to select. You can replace '' with specific column names if needed.

  2. $this->db->from('your_table');: Specifies the table from which to retrieve data. Replace 'your_table' with your actual table name.

  3. $this->db->order_by('column1', 'asc');: Sets the first ORDER BY condition. Replace 'column1' with the name of the column by which you want to sort in ascending order. Change 'asc' to 'desc' if you want descending order.

  4. $this->db->order_by('column2', 'desc');: Adds a second ORDER BY condition. Replace 'column2' with the name of the column by which you want to sort in descending order.

  5. $query = $this->db->get();: Executes the query and retrieves the results.

This code generates an SQL query similar to: 

SELECT * FROM your_table ORDER BY column1 ASC, column2 DESC;

This query will sort the results first by column1 in ascending order and then by column2 in descending order. Adjust the column names and sorting orders as needed for your specific use case.