Learn the reason and how to get to the bottom of the ORA-00054 error message in Oracle.
When you come upon an ORA-00054 error, the following error message will appear:
ORA-00054: resource busy and collect with NOWAIT designated
You tried to execute a LOCK TABLE or SELECT FOR UPDATE command with the NOWAIT key-word but the resource was once unavailable.
Or you tried to DROP a COLUMN the usage of the ALTER TABLE command and acquired the error.
The option(s) to resolve this Oracle error are:
Wait and attempt the command once more after a few minutes.
Execute the command without the NOWAIT keyword.
If the error came about whilst attempting to DROP a COLUMN, be positive to backup the data. Then TRUNCATE the desk and execute the DROP COLUMN command again.