what is a primary keyprimary key is chosen by the
What is a primary key?
Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
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q what is the kind of circulatory system present in annelidsin beings of the phylum annelida the circulatory system is closed that is blood
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what is a primary keyprimary key is chosen by the database designer as the principal means of identifying an entity in the entity
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