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Candidate key and primary key differnece?
All Primary keys are definitely Candidate Keys. A Candidate key is one which can be used as a Primary key that is not null and unique. That is one of the candidate keys can be chosen as a primary key.A Candidate key is a Unique Key and it can be used to find out any particular Tuple (row) in a table. The following are the differences between A Candidate key and a Primary Key: 1) A Unique key can be null but not a Primary key 2) On a table we can have only 1 primary key but 'N' number of unique keys.
What are the Two differences?
one is a mixture of difrent things in one and 2 is it can be with a mixture of chemicals
How many descriptions are given for each number on a dichotomous key?
Two.
What is the difference between session key and master key?
A session key is a temporary encryption keyused between two principals.A master key is a long-lasting key that isused between a key distribution centre and aprincipal for the purpose of encoding thetransmission of session keys.Typically, the master keys are distributed bynoncryptographic means.
Why does a dichotomous key offer two choices at each stage and not more than two?
A dichotomous key offers two choices at each stage because it is designed to systematically narrow down the possibilities by presenting mutually exclusive options based on specific characteristics. By providing only two choices, it ensures clarity and precision in the identification process, allowing users to progress through the key efficiently without ambiguity or confusion. Adding more than two choices at each stage could complicate the key and make it harder for users to accurately identify the organism or object in question.
What were two key differences between the north's economy and the south's economy?
what were two key differences between the north's economy and the south's economy?
Which game is more commonly known as checkers vs draughts, and what are the key differences between the two"?
Checkers is more commonly known as draughts in some countries. The key differences between the two are the board size and the starting positions of the pieces.
What are the key differences between spiders and insects?
Spiders and insects are both arthropods, but they have key differences. Spiders have two body segments and eight legs, while insects have three body segments and six legs. Spiders also have fangs and produce silk, while insects have antennae and wings.
What are the differences between conventional and public key algorithms?
In cryptography, public key algorithms require two keys, one secret and one public. The public key is used in the encryption function, while the secret key is used in decryption . Conventional, or symmetric algorithms use a single key for both purposes.
What are the key differences between human and ape DNA?
The key differences between human and ape DNA lie in the specific sequences of genes and genetic variations that distinguish the two species. While humans and apes share a high degree of genetic similarity, there are distinct differences in certain genes and regions of DNA that contribute to the unique characteristics and traits of each species. These genetic differences have played a role in the evolution and divergence of humans and apes over time.
What does campare and contrast mean?
Compare means to identify similarities between two or more things, while contrast means to identify differences between them. When you compare and contrast, you are examining both the similarities and differences in order to highlight key distinctions.
What is the differences between key board and piano?
piano has more keys
What were the key differences between 'Riots' and 'Rebellions' in Tudor England?
none
What are the differences between super key primary key candidate key and foreign key?
Super key: A set of attributes that uniquely identifies a tuple in a table. Primary key: A specific super key chosen to uniquely identify each tuple in a table and must be unique and not null. Candidate key: Any super key that could be chosen as the primary key. Foreign key: A field in a table that is a primary key in another table, used to establish a relationship between the two tables.
What are the differences between a minor and a major key in music theory?
In music theory, a major key is characterized by a brighter, happier sound, while a minor key has a darker, sadder sound. The main difference between the two is the arrangement of intervals between the notes in the scale, which gives each key its distinct emotional quality.
What are the key differences in the DNA between chimpanzees and humans?
The key differences in DNA between chimpanzees and humans are found in the specific sequences of genes and genetic variations that make each species unique. These differences contribute to the distinct physical and behavioral characteristics of chimpanzees and humans.
What were the key religious differences between the European nations the explored the Americas?
The key religious differences between the European nations that explored the Americas is the same as the rest of the world. Some are Muslims, Christians and so on.
