Year: 2018

Cannot drop column from table owned by SYS

Cannot combine drop column with other operations

Columns in partially dropped state. Submit ALTER TABLE DROP COLUMNS CONTINUE

Tablespace ‘string’ is read only- cannot drop column

Cannot drop partitioning column

Cannot drop all columns in a table

Cannot drop column from a nested table

Cannot drop column from an object type table

Checkpoint option not allowed with SET UNUSED

Permanent tablespace cannot be temporary tablespace