How to fix the Oracle error ORA-14188: sub-partitioning columns must form a subset of key columns of a UNIQUE index?

In this post, you’ll learn more about the Oracle ErrorORA-14188: sub-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-14188: sub-partitioning columns must form a subset of key columns of a UNIQUE index

Reason for the Error ORA-14188: sub-partitioning columns must form a subset of key columns of a UNIQUE index

User attempted to create a UNIQUE partitioned index whose sub-partitioning columns do not form a subset of its key columns which is illegal

How to fix the Error ORA-14188: sub-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 subpartitioning 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 subpartitioning columns to ensure that the index’ subpartitioning columns form a subset of its key columns