What is the difference between sap erp and oracle erp?

Oracle ERP - It is a database buisness for small middle and large.

SAP ERP - It is a application buisness,  a small middleware buisness and little bit of database technology.

-SAP is an Enterprise Resource Planning software that integrates several business applications, which are designed for specific business areas. 

-Oracle database is an Object Relational Database Management System that supports a large range of platforms. Oracle DBMS is available in different versions ranging from versions for personal use and enterprise class versions.

SAP is a complex ERP software that integrates several business applications, while Oracle is a ORDBMS that could be used in enterprise environments. SAP allows real time management and tracking of sales, productions, finance, accounting and human resources in an enterprise, while Oracle DBMS can be used to manage data in the enterprise. SAP is developed to be used with many database systems and it includes interfaces for Oracle as well. During the initial SAP installation, Oracle can be defined as the database that is going to be used and then the SAP system will issue SQL commands that are compatible with the Oracle DBMS.

In simple term we can say that SAP is ERP software that integrates various business applications which are designed for specific industries. Oracle database is a supports large database management for several industries in large scale.