Verizon interview questions- Telephonic round.                                        
1. SQL loader.                           
2. What is constraint?            
3. Difference between primary key and foreign key?                                          
4. What is view?                           
5. Difference between delete and truncate?               
6. Can we perform dml operation in view?                 
7. Difference between procedures and functions?                                
8. Rank & dense rank.            
9. Cursor in detail.                  
10.Null functions