To convert the provided statement into a syntax that would validate in SAP Datasphere, you would typically need to make adjustments to ensure that the structure and functions are compatible with the SQL-like language used in Datasphere.
Here’s a restructured version of the original statement that should work in SAP Datasphere:
```sql
CASE
WHEN "COMP_CD" IN ('6300', '6400', '6600', '6500') THEN
CASE
WHEN "WAERS" =