What are the benefits of using Java for an Web application?
Since Java EE 5, many great changes have come into Java EE that allow some great, easy to use web applications powered by Java at the core.
Why have companies moved away from large mainframe systems to more distributed technology in datacenters?
Mainframe systems used to have multiple processes and were able to be loaded with a ton of memory and were able to to multi thread applications and work load. With newer cpu chips, and more common server equipment and cheaper equipment, data centers now can have multiple servers that will be able to multi thread and handle load mainframes could spread across the servers.
How would you inner join table A to table B on itemno that both tables have?
select a.itemno,b.itemno from table a inner join table b on a.itemno = b.itemno.