| Column Name | Data Type | Description |
|---|---|---|
| id_column | INTEGER, SMALLINT, BIGINT, NUMERIC, NUMERIC(p), NUMERIC(p,a), TEXT, VARCHAR, VARCHAR(n), UUID, BYTEA | Identifier of the training samples. |
| attribute_column | DOUBLE | Can be more than one column. Each column contains the values of an attribute of the training samples. |
| label | INTEGER or STRING | Class of the sample. |