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Which is another name for weak entity?
Child is another name of weak entity.
Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined): 2160_Convert the following ER - diagram into a
What are axioms? Axioms or rules of inference give a simpler technique for reasoning about
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
what is entity in database system?
losers with new information systems
Explain nested relations? Nested relations The assumption of INF is a natural one in the bank examples we have considered. However, not all applications are best modelled
Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
What is the role of a database administrator?
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N
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