How to fix the Oracle error ORA-12991: column is referenced in a multi-column constraint?

In this post, you’ll learn more about the Oracle ErrorORA-12991: column is referenced in a multi-column constraint with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12991: column is referenced in a multi-column constraint

Reason for the Error ORA-12991: column is referenced in a multi-column constraint

An attempt was made to drop a column referenced by some constraints.

How to fix the Error ORA-12991: column is referenced in a multi-column constraint ?

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

Drop all constraints referencing the dropped column or specify CASCADE CONSTRAINTS in statement.