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Why do the Primary keys need to be unique?
Primary key helps differentiate the data in a table which contains multiple occurrences of any value in columns. Besides that it is considered good programming practice which will ensure that there is no duplication of data in database thereby saving server space.
What is the single name for group of keys?
The collective nouns are a bunch of keys or a ring of keys.
How does the circle of 5ths relate to the order of sharps and flats?
The Circle of Keys is a diagram of all Major and minor keys signatures. The sharp keys are arranged from the top, moving clockwise. The flat keys are arranged from the top, moving counterclockwise. There are fifteen Major keys: seven sharp keys, seven flat keys, and one key with no sharps or flats. Likewise, there are fifteen relative minor keys. The keys at the bottom of the circle are called enharmonic keys because their tones sound the same but are named and written differently. The Circle of Keys is sometimes called the Circle of Fifths because the keys are arranged an interval of a fifth apart.
How many keys are there in the keyboard?
104 keys in the keyboard
How many keys does an accordion have?
The number of keys on an accordion is highly variable. A typical accordion like the stradella has 120 keys in 3 rows. The smallest accordion ever made had 31 keys and the largest had 405 keys.
