Answer:
The trigger code is given below
create trigger F1_Del
after delete on Friend
for each row
when exists (select * from Friend
where ID1 = Old.ID2 and ID2 = Old.ID1)
begin
delete from Friend
where (ID1 = Old.ID2 and ID2 = Old.ID1);
end
create trigger F1_Insert
after insert on Friend
for each row
when not exists (select * from Friend
where ID1 = New.ID2 and ID2 = New.ID1)
begin
insert into Friend values (New.ID2, New.ID1);
end
Answer:
Answers in explanation. Try to ask one question at a time, it is easier for people to answer single questions and you will get answers faster.
Explanation:
15. A
16. D
17. B + C
18. A+B+D
19. B+C+D
**20. is NOT Planned personal leave for documentation developers and proof readers. The other 4 answers are correct
21. Presentation notes + Outline
22.B
23.D (im not entirely sure about this one)
B. Television. It provided <span>instant communication and information to a massive audience for the first time in 1927.
Hope this helps :)</span>
Answer:
Use autofill
Explanation:
In excel "autofill" is used to fill data in cells, which follows the pattern or logic applied in other cells. To apply same calculation of A20 in B20 to H20, we use autofill technique. Instead of copy pasting, or manually entering the complex formula this method is more suitable.
Answer:
the change that computers go through
Explanation:
like 6 generation