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er diagram on cosmetics.
explain participation constraints with examples
Explain ER Relationship model? An entity-relationship model (ERM): An entity-relationship model (ERM) is an abstract theoretical illustration of structured data. Entity-relatio
what is primary key
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
Q. Explain the terms key constraints participation constraints and mapping caradinalities in ER model. Participation Constraints : The participation of an entity set E i
Which is a legal expression in SQL? SELECT NAME FROM EMPLOYEE is a legal expression in SQL.
what is specialization?
Which is another name for weak entity? Child is another name of weak entity.
Mappings between Levels and Data Independence The 3 levels of abstraction in the database do not exist separately of each other. There must be some correspondence, or mapping
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