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Backward Recovery (UNDO):In this system the uncommitted changes made by a transaction to a database are undone. Instead the system is reset to the last consistent state of database that is free from any errors.
A relationship set is a set of relationships of the similar type. For example, let consider the relationship among two entities sets course and student. Collection of all the in
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
What is a trigger
Which model is record based logical model? Network Modelis basically known as record based logical model.
What is Index? An index is a physical structure having pointers to the data. Indices are created in an existing table to locate rows more quickly and efficiently. It is possibl
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
Represent the following scenarios with E-R diagrams drawn using the ER Assistant software. The diagrams should indicate cardinality and optionality of relationships. Transform each
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