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Group By clauses • It is used to group database tuples on the basis of definite common attribute value like as employees of a department. WHERE clause still can be used
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
What is an Operand? The data on which the operation is to be performed is known as an Operand
Explain CNT in the respects of QBE ? CNT: It is one of the aggregation commands given in QBE. It is used to identify number of tuples
Related fields in a database are grouped in which form? Related data fields in a database are grouped to form a data record. (A record is a collection of related fields)
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
Selective replication: This is a combination of generating small fragments of relation and replicating them rather than a entire relation. The data should be fragmented on require
What are the various properties of Relational tables? Relational tables have 6 properties: 1. Each row is unique. 2. Column values are of the same kind. 3. Values are
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Benefits of using heuristics
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