ORA-00406 COMPATIBLE parameter needs to be string or greater
Cause: The value of the COMPATIBLE initialization parameter is not high enough to allow the operation. Allowing the command would make the database incompatible with the release specified by the current COMPATIBLE parameter.
Action: Shut down and restart with a higher compatibility setting.
Cause: The value of the COMPATIBLE initialization parameter is not high enough to allow the operation. Allowing the command would make the database incompatible with the release specified by the current COMPATIBLE parameter.
Action: Shut down and restart with a higher compatibility setting.
再执行删除列的sql语句，则删除才能够成功
pfile/init实例名称.ora