How to fix the Oracle error ORA-25954: missing primary key or unique constraint on dimension?

In this post, you’ll learn more about the Oracle ErrorORA-25954: missing primary key or unique constraint on dimension with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-25954: missing primary key or unique constraint on dimension

Reason for the Error ORA-25954: missing primary key or unique constraint on dimension

An attempt to create a join index was made, which failed because one or more dimensions did not have an appropriate constraint matching the join conditions.

How to fix the Error ORA-25954: missing primary key or unique constraint on dimension ?

You can fix this error in Oracle by following the below steps

Ensure that the where clause is correct (contains all of the constraint columns) and that an enforced constraint is on each dimension table.