| Table Name | Description |
| ALL_COL_COMMENTS | Comments on columns of accessible tables and views |
| Column ID | Column name | Data type | Length | Precision | NULL | Description |
| 1 | OWNER | VARCHAR2 | 30 | (null) | N | Owner of the object |
| 2 | TABLE_NAME | VARCHAR2 | 30 | (null) | N | Name of the object |
| 3 | COLUMN_NAME | VARCHAR2 | 30 | (null) | N | Name of the column |
| 4 | COMMENTS | VARCHAR2 | 4000 | (null) | Y | Comment on the column |