In this blog post, let’s learn about the error message “42Y00- Class ‘‘ does not implement org.apache.derby.iapi” in Apache Derby Database and the description of the error.
Error Message
42Y00- Class ‘‘ does not implement org.apache.derby.iapi
Error Details
Class ‘‘ does not implement org.apache.derby.iapi.db.AggregateDefinition and thus cannot be used as an aggregate expression.