In SAP Datasphere, you can use a CASE statement to achieve the same conditional logic you're describing. Here's how you can write the equivalent statement:
```sql
CASE
WHEN IsNull(SUM([Invoice Gross Value AED]) WHERE ([Year Month] = [v_CurrentMonth])) THEN 0
ELSE SUM([Invoice Gross Value AED]) WHERE ([Year Month] = [v_CurrentMonth])
END
```
### Explanation:
1. **CASE Statement**: This is used to evaluate a list of conditions and