Answer:
Below is the required statement:
Explanation:
select c.categoryname
from categories c
where not exists (select 1 from products p where p.categoryid = c.categoryid);
Answer:
C
Explanation:
Because he's knowledge ,everyone asking he's opinion if i am not wrong.
I hope i did help you on this questions
Answer:
oil rings = encloses combustion by closing off the extra space between the block and the head,
crank shaft = connects the engine to the transmition through a series of mechanisms.
gasket = reduces the amount of exhaust inside the cylinder by sealing the cylinder.
Explanation:
Pros: Readability. Unique closing reserved words on compound
statements will enhance readability and flexibility of a language. When an
endwhile or an endif in a program is written by someone else, it is vivid which
block is ending. Using braces is much harder is sometimes much harder to read.
Cons: Writability. They have the disadvantage of writability
and thus, complicating the language by increasing the number of keywords. Use
of more of these reserved words mean less words available for the programmer.
