what is a super keya super key is a set of one or
What is a super key?
A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.
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define the term domainfor each n every attribute there is a set of permitted values known as the domain of that
what is a candidate keyminimal super keys are known as candidate
what is a primary keyprimary key is chosen by the database designer as the principal means of identifying an entity in the entity
explain feed - cutting parameters1 in cylindrical grinding feed is the longitude movement of the work piece per revolutionffeed in mm per work piece
what is a super keya super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity
define- relational algebrathe relational algebra is a procedural query language it having of a set of operations that take one or two relation as
what is a select operationthe select operation selects tuples that please a given predicate we use the lowercase letter sigma to denote
what is a project operationthe project operation is a unary operation that returns its argument relation with particular attributes left out
q is there respiratory pigment in the annelid bloodthe blood in beings of the phylum annelida contains the respiratory pigment hemoglobin the same
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