I have a projects table:
+------------+-----+
| PROJECT_ID | ... |
+------------+-----+
| LC000001 | |
| LC000002 | |
| LC000003 | |
| LC000004 | |
| LC000005 | |
+------------+-----+
As you can see, the PROJECT_ID column has a text datatype (NVARCHAR2) and it has a prefix (LC).
I'm guessing that creating an ID with a prefix might have been a been a poor design choice. But, right or wrong, this is how …