Re: Foreign key in Oracle Sql

>> What are the right data types? <<

See SQL Standards for the list. There is no VARCHAR2() or NUMBER(), NULLs propagate in strings, there are both FLOAT and REAL, etc.

>> How do you tell the difference between a file system with a fancy
front end,
and a real engine? <<

Do you have operations that expose a physical ordering in the storage, such as the row number? Can you do subqueries? Is there an optimizer? Received on Fri Jan 14 2005 - 20:09:28 CET