| Data Type | Description |
| VARCHAR2(size) | Variable-length character data |
| CHAR(size) | Fixed-length character data |
| NUMBER(p,s) | Variable-length numeric data |
| DATE | Date and time values |
| LONG | Variable-length character data(up to 2G);Oracle推荐不使用此数据类型,推荐使用CLOB、BLOB |
| CLOB | Character data(up to 4GB) |
| RAW and LONG RAW | Raw binary data |
| BLOB | Binary data(up to 4GB) |
| BFILE | Binary data stored in an external file(up to 4GB) |
| ROWID | A base-64 number system representing the unique address of a row in its table. |
| Data Type | Description |
| TIMESTAMP | Date with fractional seconds |
| INTERVAL YEAR TO MONTH | Stored as an interval of years and moths |
| INTERVAL DAY TO SECOND | Stored as an interval days,hours,mintues,and seconds |