Question - Difference between “Insert”, “Update” and “Modify” ? 
          
        
        Answer - 
        INSERT - Add a new record into the database table. 
MODIFY - If record is available it modifies otherwise it wont modify. 
UPDATE - If record is available its update the record otherwise it creates a new record. 
“Catch” Command 
Trying to catch any runtime errors programmatically or manually we use this statement catch.