```
---------------colete--------------------
| id | id_comanda  | status | id_lista |
----------------------------------------
|    | 21775       | 0      | 3820     |
----------------------------------------
|    | 21776       | 0      | 3820     |
----------------------------------------
|    | 21777       | 0      | 3820     |
----------------------------------------

-----comenzi--------
| id  | taxComanda |
--------------------
|21775| 16.00      |
--------------------
|21776| 00.00      |
--------------------
|21777| 16.00      |
--------------------

```

I want to get SUM from column `taxaComand` from table `comenzi` by making the selection from column `id_lista` from table `colete`, so the SUM at the end to be `32.00`

This is what i have, but is not good.: 

```
SELECT a.id_comnda AS a_id_comanda, a.id_lista AS a_id_lista,
b.id AS b_id, b.taxaComanda AS b_taxaComanda
(SELECT sum(taxaComanda) FROM comenzi WHERE b.id = a.id_comanda AS totalTaxaComanda)
FROM colete a
INNER JOIN comenzi b ON b.id = a.id_comanda
WHERE a.id_lista = 3820
GROUP BY a.id_comanda

```