Oracle Database Exadata Express Cloud Service supports connecting to your service from a variety of database applications, clients and drivers over Oracle Net Services (SQL*Net).
About Database Clients and Versions
Oracle makes a variety of database client drivers available for use with Oracle Database Exadata Express Cloud Service.
Download links to these clients are displayed in the Exadata Express Service Console. Most of these links point to download pages hosted on the Oracle Technology Network (OTN). In almost all cases, database client versions supported with Exadata Express include Oracle Database 12c Release 1 (184.108.40.206) and Oracle Database 12c Release 2 (220.127.116.11).