CS3462/CS3402 Midterm examination
(a) Describe the data semantics of Generalization and Categorization.
(b) What are the major differences between Generalization and Categorization in terms o
Lab 3 - Aggregate Functions, Group By and Having Clauses
1. AGGREGATE FUNCTIONS
In all the examples so far, we have selected values stored in each row of a table (like
SAL), or values calculated for each row (like SAL*12). That is, we have selected
Information Security for eCommerce
A verifier only sends/receives
messages, i.e. digital data.
To check that the principal is online the
verifier need to establish:
o that the messages came from the principal