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In a Hierarchical model of data records are organized ? In the hierarchical model of data records are organized as Tree structure.
What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
What are the function of DBA?
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Explain degree of relation? Degree of a Relation - The degree or arity of a relation is the number of attributes n of its relation schema.
Can we delete data element, which is being used by table fields. No we cant delete data element.
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
The JOIN operation is applied on two relations. When we want to choose related tuples from two given relation join is used. The join operation need that both the joined relations m
What is meant by computing the closure of a set of functional dependency? The closure of F denoted by F + is the set of functional dependencies logically implied by F.
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