rdly matters. But if we have 
a million people in our database and a possibility of 100 million
friend links, it is important to be able to scan data as quickly
as possible.<br />
<br />
We will store our Twitter accounts in a table named <tt>People</tt>
instead of the <tt>Twitter</tt> table used in the previous example.
The <tt>People</tt> table has an additional column 
to store the numeric key associated with the 
row for this Twitter user. 
SQLite has a feature that automatically adds the key value
for 