| dBASE II | dBASE III | dBASE IV | |
|---|---|---|---|
| Max. no. of records | 65,535 | 1,000,000,000 | 1,000,000,000 |
| Max. fields per record | 32 | 128 | 255 |
| Max. data files open | 10 | 10 | |
| Max. index files per open database | 7 | 47 | |
| Max. record size in bytes | 1,000 | 4,000 | 4000 |
| Max. records per file | 65,535 | ||
| Max. bytes per file | 8,000,000 | ||
| Max. memory variables | - | 256 | |
| Max. memory for variables | - | 6,000 bytes *1 | |
| No. of data types | 5 | 6 | |
| Max. size of MEMO file | 5000 bytes | 64000 bytes | |
| Max. character field size in bytes | 254 | 254 | 254 |
| Max. numerical field size in bytes | 19 | 20 | |
| Size of logical field | 1 byte | 1 byte | 1 byte |
| Size of date field | 8 bytes | 8 bytes | |
| Size of memo pointer in DBF | - | 10 bytes | |
| Size of floating point | - | 1-2 | |
| Size of decimal values in numeric | 10 | 15 |