In this post, you’ll learn more about the Oracle ErrorORA-14039: partitioning columns must form a subset of key columns of a UNIQUE index with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-14039: partitioning columns must form a subset of key columns of a UNIQUE index
Reason for the Error ORA-14039: partitioning columns must form a subset of key columns of a UNIQUE index
User attempted to create a UNIQUE partitioned index whose partitioning columns do not form a subset of its key columns which is illegal
How to fix the Error ORA-14039: partitioning columns must form a subset of key columns of a UNIQUE index ?
You can fix this error in Oracle by following the below steps
If the user, indeed, desired to create an index whose partitioning columns do not form a subset of its key columns, it must be created as non-UNIQUE; otherwise, correct the list of key and/or partitioning columns to ensure that the index’ partitioning columns form a subset of its key columns