19. write a java code to implement jdbc connectivity to insert records into tables to demonstrate PreparedStatement.
20. write a java code to implelment jdbc connectivity to insert records into the tables using positional parameter
21. write a java code to implement jdbc connectivity to delete records from table to demonstrate Statement.
22. write a java code to implement jdbc connectivity to update record in the table
23. write a java code to implement jdbc connectivity to demonstrate scrollable resultset.
24. write a java code to implement jdbc connectivity to demonstrate database metadata