IT-3020 Database Systems Lecture 02| ORDB Explained | VARRAY & Nested Tables (Create, Insert, Fetch)

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In this lecture we explain key concepts of Object Relational Databases (ORDB) from the IT-3020 Database Systems module.

This session covers how advanced collection types work in ORDB using practical SQL examples.

📚 Topics Covered in This Lecture:

• Introduction to Object Relational Databases (ORDB)
• VARRAY (Variable Size Arrays)
• How to Create VARRAY Types
• Inserting Data into VARRAY
• Fetching Data from VARRAY

• Nested Tables in ORDB
• Creating Nested Table Types
• Inserting Data into Nested Tables
• Retrieving Data using TABLE() function

• Using Multiple Collections
• Combining VARRAY and Nested Tables

This lecture is useful for university students studying Database Systems, especially for the IT-3020 module.

🎓 Ideal for students learning:
Oracle Object Relational Databases
SQL Collection Types
Advanced Database Concepts

📌 Module: IT-3020 – Database Systems
📌 Topic: ORDB (VARRAY & Nested Tables)

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