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Synonyms and Indexes
Some of the essential properties of indexes are:
What is conceptual model ? A conceptual model is a independent of both hardware and software.
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types.
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
Define check point and its impact on data base recovery. Ans: There could be hundreds of transactions handled per minute, in a large on-line database system.
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
A domain is a set of permissible values that can be given to an attribute. So each attribute in a table has a definite domain. Values to these attributes cannot be assigned outside
What is an Operand? The data on which the operation is to be performed is known as an Operand
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