To exclude date and string functions from your SAP Datasphere code, we'll need to simplify it by removing any operations related to date manipulation and string handling.
Here’s the original code for reference:
```sql
LEFT(REPLACE(STRING(ADD_MONTHS(DATE(CONCAT(MNTH_END_STK_FSCL_YR, '-', MNTH_END_STK_FSCL_MNTH, '-01')), 0)), '-', ''), 6)
```
Since you want to remove functions like `DATE`, `ADD_MONTHS`, `CONCAT`, `STRING`, `REPLACE`, and