To print an envelope, insert an envelope in your printer, and then click Print.

A content filter is essentially a set of scripts or programs that restricts user access to certain networking protocols and Internet locations.

Answer the following statement true (T) or false (F)

Consider the following database schema, where the keys are underlined:

(a) Use both the relational algebra and SQL to answer the following query:
Find all possible trips from LA to NYC, which consist of two connecting flights.
(Flights connect if flight 1 arrives at the airport from where flight 2 leaves and
the arrival time of flight 1 is less than the departure time of flight 2. You can
use < to compare the times.)
(b) Use relational algebra only to answer the following query:
Find the travel agents who issued a ticket for flight originating in LA.
(c) Use SQL for the following query:
Find the travel agents who sold more than 5 tickets.
(d) Use SQL (only) to
Find the travel agents who sold the most number of tickets (among all the
agents).