select query in codeigniter code example

Example 1: where_in codeigniter

$this->db->select('ae_users.employee_id, ae_users.emp_name, ae_users.emp_name2, ae_users.emp_name3');
		$this->db->from('ae_users');                
		$this->db->where_in('ae_users.employee_id',$employee_ids);
     
		$query =$this->db->get();
             
		if ($query->num_rows()) {
			return $query->result_array();
		} else {
			return 0;
		}

Example 2: codeigniter where_not_in

$names = array('Frank', 'Todd', 'James');
$this->db->where_not_in('username', $names);
// Produces: WHERE username NOT IN ('Frank', 'Todd', 'James')

Example 3: codeigniter 4 query builder select

$builder->select('title, content, date');
$query = $builder->get();

// Executes: SELECT title, content, date FROM mytable