Explain can a view based on another view?
What is a subquery in oracle?
What is the recommended interval at which to run statspack snapshots, and why?
What are the parameters that we can pass through a stored procedure?
What is the difference between implicit index and explicit index?
How to start an oracle instance?
What is the difference between substr and instr?
Explain an integrity constrains?
What is max rowid in oracle?
13. Display the second to fifth characters in each client name.
How to drop an existing view in oracle?
 What are the oracle DML commands possible through an update strategy?
Q1:code to connect to sql server(database) through jdbc application. Q2:code to connect to Mysql(database) through jdbc application. Q3:code to connect to oracle(database) through jdbc application.