Types Schema in SAP HANA database

A database schema is a way to logically group objects such as tables, views, stored procedures etc. Also schema as a container of objects. 

Types of Schemas :

1.User Defined Schema

2.System Defined Schema

3.SLT Derived Schema

User Defined Schema:  

These are created by user (HANA DBA or System Administrator) 

SLT Derived Schema:  

When SLT is configured, it creates the schema in SAP HANA system. All the tables replicated into SAP HANA system are contained in this schema 

System Defined Schema:

These schemes are delivered with the SAP HANA database and contain HANA system information. There are system schemas like _SYS_BIC, _SYS_BI, _SYS_REPO, _SYS_STATISTICS etc.