If the CREATE TABLE command is executed more than once for the same table, MySQL overwrites the table with the newest data description.
Answer the following statement true (T) or false (F)
False
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Provide the equivalent domain relational calculus and relational algebra expressions for each of the tuple relational calculus expressions given in Exercise 4.10.
(a) {H.hotelName | Hotel(H) ? H.city = ‘London’} (b) {H.hotelName | Hotel(H) ? (?R) (Room(R) ? H.hotelNo ? R.hotelNo?? R.price ? 50)} (c) {H.hotelName | Hotel(H) ? (?B) (?G) (Booking(B) ? Guest(G) ? H.hotelNo ? B.hotelNo?? B.guestNo = G.guestNo ?? G.guestName = ‘John Smith’)} (d) {H.hotelName, G.guestName, B1.dateFrom, B2.dateFrom | Hotel(H) ? Guest(G) ? Booking(B1) ? Booking(B2) ? H.hotelNo ? B1.hotelNo?? G.guestNo = B1.guestNo ?? B2.hotelNo = B1.hotelNo ? B2.guestNo = B1.guestNo ?? B2.dateFrom ? B1.dateFrom}
How can you distinguish the footnotes in a document from the body of the report?
A) A short black line displays just above the footnote area. B) Footnote text is bolded. C) Footnotes are centered; text in the body is left justified. D) The font is the same, but footnotes are italicized.
The main objective of _____ is to avoid problems or to identify them as soon as possible.
A. direct cutover B. quality assurance C. application development D. cohesion
One of the fundamental challenges in InfoSec performance measurement is defining what?
A. interested stakeholders B. effective security C. appropriate performance measures D. the proper assessment schedule