How to fix the Oracle error ORA-30746: error occured while trying to drop column “string” in table “string”?

In this post, you’ll learn more about the Oracle ErrorORA-30746: error occured while trying to drop column “string” in table “string” with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30746: error occured while trying to drop column “string” in table “string”

Reason for the Error ORA-30746: error occured while trying to drop column “string” in table “string”

The user tried to drop a subtype with VALIDATE option which tried to check for stored instances of the type in the stated table

How to fix the Error ORA-30746: error occured while trying to drop column “string” in table “string” ?

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

Delete all instances of this subtype and then drop the type.