从MySql中选择全部并加入其他

Question

I have this codeigniter function

function allClients($orderby = 'clients_company_name', $sort = 'ASC')
{

    //profiling::
    $this->debug_methods_trail[] = __function__;

    //declare
    $conditional_sql = '';

    //check if any specifi ordering was passed
    if (! $this->db->field_exists($orderby, 'clients')) {
        $orderby = 'clients_company_name';
    }

    //check if sorting type was passed
    $sort = ($sort == 'asc' || $sort == 'desc') ? $sort : 'ASC';

    //----------sql & benchmarking start----------
    $this->benchmark->mark('code_start');

    //_____SQL QUERY_______
    $query = $this->db->query("SELECT *
                                      FROM clients
                                      ORDER BY $orderby $sort");

    $results = $query->result_array(); //multi row array

    //benchmark/debug
    $this->benchmark->mark('code_end');
    $execution_time = $this->benchmark->elapsed_time('code_start', 'code_end');

    //debugging data
    $this->__debugging(__line__, __function__, $execution_time, __class__, $results);
    //----------sql & benchmarking end----------

    //return results
    return $results;

}

It selects all data from table clients. One of them is "client_team_profile_id" - the owner of this client.

I also need to join other table - team profiles. There we can find team_profile_id (there are ids of users in system) and team_profile_full_name - names of users.

Table: clients

clients_id|clients-company_name|client_address|clients_team_profile_id
1         |Apple               |some street   |2
2         |Dell                |some street   |5


Table team_profile

team_profile_id | team_profile_full_name|
2               |John                   |
5               |Bob                    |

I need to select all data from table CLIENTS (as we can see - Select *) and also get name of team user connected to client and set a parameter for result - AS f.ex. client_owner_name.

I appreciate your help.

Answer 1

So you can add this JOIN to your existing query

SELECT c.*, t.team_profile_full_name as client_owner_name
FROM clients c
    JOIN team_profile t ON t.team_profile_id = c.clients_team_profile_id
ORDER BY $orderby $sort"

You may also need to change this bit of code to use the table alias like so

 //check if any specifi ordering was passed
if (! $this->db->field_exists($orderby, 'clients')) {
    $orderby = 'c.clients_company_name';
}

And also

function allClients($orderby = 'c.clients_company_name', $sort = 'ASC')