| DBIBaseTrans | Base class for DBI querable and updatable items. |
| DBIBlobStream | Specific DBI stream used to read and write to and from blobs. |
| DBIError | DBI specific error. |
| DBIHandle | DBI connection handle returned by DBIConnect. |
| DBIRecord | Base class for object oriented database access. |
| DBIRecordset | Represent a collection of database records as required from DBIBaseTrans.query. You will not instantiate this class directly, instead, you must use DBIBaseTrans.query. |
| DBITransaction | Represents one transaction in the underlying database server. |
| MySQL | Direct interface to MySQL database. |
| ODBC | Direct interface to ODBC connections. |
| PgSQL | Direct interface to Postgre SQL database. |
| SQLite3 | Direct interface to SQLite3 database. |