How to Restful delete method works?

I am practicing on Restful Apis. I can use Get and Post methods. However, I couldn’t use the Delete method. I added the If-Match parameter to the header. I tried “*” as the value, I tried with etag value. I couldn’t solve the problem. The error message is “ORA-20100: Error.ODATA_TO_PLSQL_PROTOCOL: ETag must have a valid value, was [*]” How can I delete a record?

Example

Projection: main/ifsapplications/projection/v1/EmployeesHandling.svc

I can Post gender.

I can Get the gender.

I can’t Delete the gender.