# Data Dictionary

SQL Interface Objects |

PxPlus also includes a set of OOP objects that are designed for accessing and updating external SQL databases in much the same way as PxPlus Data Dictionary Objects.

The following support external database interfaces in PxPlus:

| db_ado | Interface for connecting to a Microsoft SQL-Server database.
| db_db2 | Interface for connecting to an IBM DB2 database.
| db_oci | Interface for connecting to an Oracle database.
| db_odb | Interface for generic open database connectivity.
| db_mysql | Interface for connecting to a MYSQL database.

Some of these objects replace older versions (see Legacy SQL Objects).