I need help with creating the following operation:
<tbody>
</tbody>
Column A is duplicated and then changed to the next in order. Column B & C remain the same. Column B stays 1-20. Column C is the same for the 20 rows, but is not actual "A", "B"..."U".
Finished Good 1 | 0 | A |
Finished Good 1 | 1 | B |
... | ... | ... |
Finished Good 1 | 20 | U |
Finished Good 2 | 0 | A |
Finished Good 2 | 1 | B |
... | ... | ... |
Finished Good 2 | 20 | U |
Finished Good 30,888 | 0 | A |
Finished Good 30,888 | 1 | B |
... | ... | ... |
Finished Good 30,888 | 20 | U |
<tbody>
</tbody>
Column A is duplicated and then changed to the next in order. Column B & C remain the same. Column B stays 1-20. Column C is the same for the 20 rows, but is not actual "A", "B"..."U".