[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] elements, sets  embedding authorization queries  error checking, importing and  error messages, extending  event reconstruction, audit logs  EventLogMaster table  EventMessage procedure  events     error messages      logging, stored procedure      reporting, logs      temporal data, nonrecurring      temporal data, recurring  EXCEPT keyword  EXISTS clause, SELECT statement  exponential averages, statistics  extending error messages  external data, importing