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What is Cardinality Ratio?
Cardinality Ratios - The cardinality ratios for relationship kinds specifies the maximum number of relationship instances in which an entity can participate in. The possible cardinality ratios for relationship categories are one-to-one (1:1), one-to-many or many-to-one (1:M or M:1), and many-to-many (M:N).
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
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what is attribute is attribute inheritance in dbms?
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