Hi I would like to ask if how can I separately identify these codes through creating another column. I would like to identify as "E" the id codes that contain numbers only while the codes that have letters plus numbers will be identified as "L". I would just like to add another column named "IDENTIFIER". Kindly see table below for the expected output.
| ID | IDENTIFER |
| 6435474 | E |
| 1074858 | E |
| AB566889 | L |
| C48755CD | L |
can you help me with this one pls? thank you