What is Unique Key?

What is referential Integrity? What is Foreign Key?

What is Primary key? How is it different from Candidate key?

What are constraints in Oracle?

What is Candidate Key?

What is Entity - Relationship. What is ER Diagram?

What in entity?

What are various steps in Normalization

What is Normalization?

What is DDL/DQML/DML/DCL/TCL? Explain with Examples..

What is SQL?

Explain HDBMS, RDBMS, NDBMS with diferences

What are various Data Models?

What is RDBMS? How is it different from DBMS?

Q1. What is Oracle?