How to fix the Oracle error ORA-01754: a table may contain only one column of type LONG?

In this post, you’ll learn more about the Oracle ErrorORA-01754: a table may contain only one column of type LONG with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01754: a table may contain only one column of type LONG

Reason for the Error ORA-01754: a table may contain only one column of type LONG

An attempt was made to add a LONG column to a table which already had a LONG column. Note that even if the LONG column currently in the table has already been marked unused, another LONG column may not be added until the unused columns are dropped.

How to fix the Error ORA-01754: a table may contain only one column of type LONG ?

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

Remove the LONG column currently in the table by using the ALTER TABLE command.