[merchant]
+---------------------------+--------------------+
| merchant_id               | hardware           |
+---------------------------+--------------------+
| 4                         | ["21","117","118"] |
+---------------------------+--------------------+

[hardware]
+---------------------------+---------------------+
| hardware_id               | hardware_unique_sort|
+---------------------------+---------------------+
| 21                        | 2030                |
+---------------------------+---------------------+
| 117                       | 910                 |
+---------------------------+---------------------+
| 118                       | 2380                |
+---------------------------+---------------------+

merchant
+---------------------------+--------------------+
| merchant_id               | hardware           |
+---------------------------+--------------------+
| 4                         | ["117","21","118"] |
+---------------------------+--------------------+