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Why you need primary key and foreign key?
In sql you use primary key more than one column in a table
Using a 20-bit key is how many times more secure than using a 18-bit key?
four times. adding 1 bit to an encryption key makes it twice as hard to crack.
How can you tell the difference between a key signature in major or minor?
In a major piece, it will sound much more livelier, but in a minor key, it will sound more sadder. like in the piece: Notturno, by Grieg, it is in a minor key, therefore it sounds much more sadder than the piece: Le Petit Negre, by Debussy.
What is an often key word in a multiplication or division problem?
for multiplecation: product. ex.) what is the product of 6 and 5? for division: quotient. ex.) what is the quotient of 4 and 2?
Why is a duplicate key like a small cake in math?
A duplicate key in math is like a small cake because both represent a situation where something is repeated or replicated. Just as a small cake can be enjoyed in multiple portions, a duplicate key allows for the same value or solution to appear more than once in a set. This repetition can affect calculations, much like having extra cake can alter the overall quantity available. In both cases, it's important to recognize the duplicates to avoid overcounting or miscalculating.
