Q1.composite key and Q2.correlated subquery
"zephyr" <[email protected]> Sun, 9 Feb 2003 15:57:16 +1100
| Newsgroups | gmane.comp.db.oracle.devel |
|---|---|
| Message-ID | <LYRIS-1796914-867254-2003.02.09-04.57.07--gcdod-oracle#[email protected]> |
Hi everyone i have two questions here. thank you for your attention. 1. Explain, in simple terms, the concept of composite keys and why we use them. 2. What is a correlated subquery and why it is "dangerous"? --- Change your mail options at http://p2p.wrox.com/manager.asp or to unsubscribe send a blank email to [email protected].